ISP Mail Server HowTo: Difference between revisions
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[http://roundcube.net/ RoundCube] is an "ajax /Web2.0" web-mail client. These instructions are for the Alpine Linux 1.10 repository | [http://roundcube.net/ RoundCube] is an "ajax /Web2.0" web-mail client. These instructions are for the Alpine Linux 1.10 repository | ||
Verify that you have at least the following in /etc/postfix/main.cf. Unless you have followed the Relay for Authenticated Users section above, set '''smtpd_tls_auth_only = no''', otherwise leave it set to '''yes''': | * Verify that you have at least the following in /etc/postfix/main.cf. Unless you have followed the Relay for Authenticated Users section above, set '''smtpd_tls_auth_only = no''', otherwise leave it set to '''yes''': | ||
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</pre> | </pre> | ||
Ensure you have this section in /etc/dovecot/dovecot.conf, inside the ''auth default'' stanza: | * Ensure you have this section in /etc/dovecot/dovecot.conf, inside the ''auth default'' stanza: | ||
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} | } | ||
} | } | ||
</pre> | |||
* Restart the relevant services: | |||
<pre> | |||
/etc/init.d/postfix restart | |||
/etc/init.d/dovecot restart | |||
</pre> | </pre> | ||
Revision as of 14:49, 27 August 2010
A Full Service Mail Server
The goal of this document is to describe how to set up postfix, dovecot, clamav, dspam, roundecube, and postfixadmin for a full-featured "ISP" level mail server.
The server must provide:
- multiple virtual domains
- admins for each domain (to add/remove virtual accounts)
- Quota support per domain / account
- downloading email via IMAP / IMAPS / POP3 / POP3S
- relaying email for authenticated users with TLS or SSL (Submission / SMTPS protocol)
- Standard filters (virus/spam/rbl/etc)
- Web mail client
- Value Add services
Set up Lighttpd + PHP
PostfixAdmin needs php pgpsql and imap modules, so we do it in this step.
apk add lighttpd php php-pgsql php-imap
Stop and remove mini_httpd, and move ACF to lighttpd; We are setting this up to be a multi-domain virtual web server (replace host.example.com with the actual domain):
/etc/init.d/mini_httpd stop apk del mini_httpd mkdir -p /var/www/domains/host.example.com/www ln -s /usr/share/acf/www /var/www/domains/host.example.com/www/acf
Edit /var/www/domains/host.example.com/index.html to put a simple redirection page:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>host.example.com Redirector</title> </head> <body> <ul> <li><a href="/acf">ACF</a></li> <li><a href="/postfixadmin">PostfixAdmin</a></li> <li><a href="/roundcube">Roundcube</a></li> </ul> </body>
Edit /etc/lighttpd/mod_cgi.conf to serve haserl files by adding a "" => "" cgi handler and to treat /acf/cgi-bin as a CGI directory (remove the '^')
$HTTP["url"] =~ "/cgi-bin/" {
# disable directory listings
dir-listing.activate = "disable"
# only allow cgi's in this directory
cgi.assign = (
".pl" => "/usr/bin/perl",
".cgi" => "/usr/bin/perl",
"" => ""
)
}
Get a web certificate, and install it. You have two options: 1. If you want to use a self-signed cert, you can use the instructions found at Generating SSL certs with ACF or Generating SSL certs with ACF 1.9 to generate it. 2. Use the certificate created with the setup-acf command.
Option 1: If you create your own self-signed certificate, you can create the "server-bundle.pem" and the "ca-crt.pem" file with these commands:
openssl pkcs12 -nokeys -cacerts -in certificate.pfx -out /etc/lighttpd/ca-crt.pem openssl pkcs12 -nodes -in certificate.pfx -out /etc/lighttpd/server-bundle.pem chown root:root /etc/lighttpd/server-bundle.pem chmod 400 /etc/lighttpd/server-bundle.pem
Note: The server certificate and key are in the server-bundle.pem file, so it is critical that the file be read-only by user "root".
Option 2: If you prefer to just use the default certificate created with the setup-acf command, then you will need to do the following:
setup-acf
During the above process, mini_httpd will be started, if it isn't already, and a certificate will be created. Once you have completed the setup-acf steps, do the following to move the certificate files to the correct location for lighttpd to use.
mv /etc/ssl/mini_httpd/server.pem /etc/lighttpd/server-bundle.pem chown root:root /etc/lighttpd/server-bundle.pem chmod 400 /etc/lighttpd/server-bundle.pem
Add these lines to /etc/lighttpd/lighttpd.conf to point to the new document root, and set it up to listen on port 443 (replace host.example.com with the actual domain and ip_address_of_server with the actual IP address):
simple-vhost.server-root = "/var/www/domains/"
simple-vhost.default-host = "/host.example.com/"
simple-vhost.document-root = "www/"
$SERVER["socket"] == "ip_address_of_server:443" {
ssl.engine = "enable"
ssl.pemfile = "/etc/lighttpd/server-bundle.pem"
}
If you went with Option 1 above, then add an additional line underneath the ssl.pemfile line, so that the section appears as follows:
$SERVER["socket"] == "ip_address_of_server:443" {
ssl.engine = "enable"
ssl.pemfile = "/etc/lighttpd/server-bundle.pem"
ssl.ca-file = "/etc/lighttpd/ca-crt.pem"
}
Ensure that the simple_vhosts module is loaded, as well as the cgi config scripts by uncommenting the following lines in /etc/lighttpd/lighttpd.conf
server.modules = (
# other modules may be listed
"mod_simple_vhost",
# other modules may be listed
.
.
.
include "mod_cgi.conf"
include "mod_fastcgi.conf"
Stop and remove mini_httpd; start lighttpd, test
/etc/init.d/mini_httpd stop rc-update del mini_httpd apk del mini_httpd rc-update add lighttpd /etc/init.d/lighttpd start
At this point you should be able to see ACF being served with lighttpd (Note: this will work well with alpine 1.10. With earlier versions there will be problems.) https://host.example.com/acf/
Install Postgresql
Add and configure postgresql
apk add acf-postgresql postgresql-client /etc/init.d/postgresql setup /etc/init.d/postgresql start rc-update add postgresql
At this point any user can connect to the sql server with "trust" mechanism. If you want to enforce password authentication (you probably do) edit /var/lib/postgresql/8.4/data/pg_hba.conf
Editme: What should we recommend?
Create the postfix database:
psql -U postgres create user postfix with password '******'; create database postfix owner postfix; \c postfix create language plpgsql; \q
(Of course, use your selected password where ******* is shown above.)
Install PostfixAdmin
We are going to install the postfix admin web front-end before we install the mail server. This just creates an interface to populate the SQL tables that postfix and dovecot will use.
Download PostfixAdmin from Sourceforge. When these instructions were written, 2.3 was the current release, so (replace host.example.com with the actual domain):
wget http://downloads.sourceforge.net/project/postfixadmin/postfixadmin/postfixadmin-2.3.2/postfixadmin-2.3.2.tar.gz tar zxvf postfixadmin-2.3.2.tar.gz mkdir -p /var/www/domains/host.example.com/www/postfixadmin mv postfixadmin-2.3.2/* /var/www/domains/host.example.com/www/postfixadmin rm -rf postfixadmin*
Edit /var/www/domains/host.example.com/www/postfixadmin/config.inc.php and modify at least these lines (replace host.example.com with the actual domain):
$CONF['configured'] = true; $CONF['setup_password'] = ""; << Don't change this yet $CONF['database_type'] = 'pgsql'; $CONF['database_host'] = 'localhost'; $CONF['database_user'] = 'postfix'; $CONF['database_password'] = '*****'; << The password you chose above $CONF['database_name'] = 'postfix'; $CONF['database_prefix'] = ""; $CONF['admin_email'] = 'you@some.email.com'; << Your email address $CONF['encrypt'] = 'md5crypt'; $CONF['authlib_default_flavor'] = 'md5raw'; $CONF['dovecotpw'] = "/usr/sbin/dovecotpw"; $CONF['domain_path'] = 'YES'; $CONF['domain_in_mailbox'] = 'NO'; $CONF['aliases'] = '10'; $CONF['mailboxes'] = '10'; $CONF['maxquota'] = '10'; $CONF['quota'] = 'YES'; $CONF['quota_multiplier'] = '1024000'; $CONF['vacation'] = 'NO'; $CONF['vacation_control'] ='NO'; $CONF['vacation_control_admin'] = 'NO'; $CONF['alias_control'] = 'YES'; $CONF['alias_control_admin'] = 'YES'; $CONF['special_alias_control'] = 'YES'; $CONF['fetchmail'] = 'NO'; $CONF['user_footer_link'] = "http://host.example.com/postfixadmin"; $CONF['footer_link'] = 'http://host.example.com/postfixadmin/main.php'; $CONF['create_mailbox_subdirs_prefix']=""; $CONF['used_quotas'] = 'YES'; $CONF['new_quota_table'] = 'YES';
You should further edit /var/www/domains/host.example.com/www/postfixadmin/config.inc.php and replace all instances of "change-this-to-your.domain.tld" with your actual mail domain. This can be done with busybox sed (replace example.com with your domain name):
sed -i -e 's/change-this-to-your.domain.tld/example.com/g' /var/www/domains/host.example.com/www/postfixadmin/config.inc.php
Go to https://host.example.com/postfixadmin/setup.php
Create the password hash, add it to the config.inc.php file
Go back to https://host.example.com/postfixadmin/setup.php
Create superadmin account.
Install Postfix
Create a user for the virtual mail delivery, and get its uid/gid (you'll need the numeric uid/gid for postfix)
adduser vmail -H -D -s /bin/false grep vmail /etc/passwd
(In examples below, we use 1006/1006 for the uid/gid)
Create the mail directory, and assign vmail as the owner
mkdir -p /var/mail/domains chown -R vmail:vmail /var/mail/domains
Install postfix
apk add acf-postfix postfix-pgsql
Edit the /etc/postfix/main.cf file. Here's an example (don't forget to replace the uid/gid):
myhostname=host.example.com
mydomain=example.com
mydestination = localhost.$mydomain, localhost
mynetworks_style = subnet
mynetworks = 127.0.0.0/8
virtual_mailbox_domains = proxy:pgsql:/etc/postfix/sql/pgsql_virtual_domains_maps.cf
virtual_alias_maps = proxy:pgsql:/etc/postfix/sql/pgsql_virtual_alias_maps.cf,
proxy:pgsql:/etc/postfix/sql/pgsql_virtual_alias_domain_maps.cf,
proxy:pgsql:/etc/postfix/sql/pgsql_virtual_alias_domain_catchall_maps.cf
virtual_mailbox_maps = proxy:pgsql:/etc/postfix/sql/pgsql_virtual_mailbox_maps.cf,
proxy:pgsql:/etc/postfix/sql/pgsql_virtual_alias_domain_mailbox_maps.cf
virtual_mailbox_base = /var/mail/domains/
virtual_gid_maps = static:1006
virtual_uid_maps = static:1006
virtual_minimum_uid = 100
virtual_transport = virtual
# This next command means you must create a virtual
# domain for the host itself - ALL mail goes through
# The virtual transport
mailbox_transport = virtual
local_transport = virtual
local_transport_maps = $virtual_mailbox_maps
smtpd_helo_required = yes
disable_vrfy_command = yes
message_size_limit = 10240000
queue_minfree = 51200000
smtpd_sender_restrictions =
permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain
smtpd_recipient_restrictions =
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_rbl_client dnsbl.sorbs.net,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client bl.spamcop.net
smtpd_data_restrictions = reject_unauth_pipelining
# we will use this later - This prevents cleartext authentication
# for relaying
smtpd_tls_auth_only = yes
Now we need to create a *bunch* of files so that postfix can get the delivery information out of sql. Here's a shell script to create the scripts. Change PGPW to the password for the postfix user of the postfix SQL database.
cd /etc/postfix mkdir sql PGPW="ChangeMe" cat - <<EOF >sql/pgsql_virtual_alias_domain_catchall_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = Select goto From alias,alias_domain where alias_domain.alias_domain = '%d' and alias.address = '@' || alias_domain.target_domain and alias.active = true and alias_domain.active= true EOF cat - <<EOF >sql/pgsql_virtual_alias_domain_mailbox_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = Select maildir from mailbox,alias_domain where alias_domain.alias_domain = '%d' and mailbox.username = '%u' || '@' || alias_domain.target_domain and mailbox.active = true and alias_domain.active EOF cat - <<EOF >sql/pgsql_virtual_alias_domain_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = select goto from alias,alias_domain where alias_domain.alias_domain='%d' and alias.address = '%u' || '@' || alias_domain.target_domain and alias.active= true and alias_domain.active= true EOF cat - <<EOF >sql/pgsql_virtual_alias_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = Select goto From alias Where address='%s' and active ='1' EOF cat - <<EOF >sql/pgsql_virtual_domains_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = Select domain from domain where domain='%s' and active='1' EOF cat - <<EOF >sql/pgsql_virtual_mailbox_maps.cf user=postfix password = $PGPW hosts = localhost dbname = postfix query = Select maildir from mailbox where username='%s' and active=true EOF chown -R postfix:postfix sql chmod 640 sql/*
At this point you should be able to start up postfix
newaliases # so postfix is happy... /etc/init.d/postfix start rc-update add postfix
Create a domain in PostfixAdmin and test
Go to http://host.example.com/postfixadmin/
Log in using the superadmin account, create a domain for the local box (e.g. example.com), and create a user mailbox (e.g. root).
From the machine, send a test message:
sendmail -t root@example.com subject: test . ^d
In /var/log/mail.log (or /var/log/messages, if you still have busybox syslogd running) you should see the message queued. The message should be in /var/mail/domains/example.com/root/new
Install Dovecot
Dovecot is the POP3/IMAP server to retrieve mail.
As before, we install dovecot:
apk add acf-dovecot dovecot-pgsql
edit /etc/dovecot/dovecot.conf
# Select only the protocols you wish to support - all are listed in the next line
protocols = imap imaps pop3 pop3s
log_path = /var/log/dovecot.log
info_log_path = /var/log/dovecot-info.log
disable_plaintext_auth = no
auth_username_format = %Lu
# Authenticated IMAP
ssl = yes
ssl_cert_file = /etc/lighttpd/server-bundle.pem
ssl_key_file = /etc/lighttpd/server-bundle.pem
auth_verbose = yes
auth_debug = no
mail_location = maildir:/var/mail/domains/%d/%n
auth default {
mechanisms = plain
passdb sql {
args = /etc/dovecot/dovecot-sql.conf
}
userdb static {
args = uid=1006 gid=1006 home=/var/mail/domains/%d/%n
}
}
protocol imap {
mail_plugins = autocreate
}
plugin {
autocreate = Trash
autocreate2 = Spam
autocreate3 = Sent
autosubscribe = Trash
autosubscribe2 = Spam
autosubscribe3 = Sent
}
Be sure to replace the uid and gid with the appropriate values for the vmail user.
We need a certificate for SSL/TLS authentication, so in the example above, we use the lighttpd cert. That way when the cert is renewed/replaced, Dovecot will have access to the new cert as well.
Create the /etc/dovecot/dovecot-sql.conf file:
driver = pgsql connect = host=localhost dbname=postfix user=postfix password=******** password_query = select username,password from mailbox where local_part = '%n' and domain = '%d' default_pass_scheme = MD5-CRYPT
Again, change the password above to your postfix user password, and protect the file from prying eyes:
chown root:root /etc/dovecot/dovecot-sql.conf chmod 600 /etc/dovecot/dovecot-sql.conf
Start dovecot
/etc/init.d/dovecot start rc-update add dovecot
Testing
Make sure your firewall allows in ports 25(SMTP) 110 (POP3), 995 (POP3S), 143(IMAP), 993(IMAPS), or whatever subset you support.
At this point, you should be able to:
* Create a new domain and add users with PostfixAdmin * Send mail to those users via SMTP to port 25 * Retrieve mail using the user's full email and password (e.g. username: user@example.com password: ChangeMe)
Value Add Features
If you followed the guide above, you now have a functional mail server with many interconnected parts. The features below assume that the server is already running as described above. You should be able to add any or all of these features below to further enhance the mail service.
Virus Scanning
This procedure uses clamav and the postfix content_filter mechanism to scan inbound and outbound email for viruses. Infected emails are dropped. Clean emails are tagged with a "scanned by clamav" header.
- Install clamav and clamsmtp:
apk add acf-clamav clamsmtp
- Edit the /etc/clamav/clamd.conf file if desired (not necessary in most cases)
- Edit /etc/clamsmtpd.conf and verify the following lines
OutAddress: 10026 Listen: 127.0.0.1:10025 Header: X-Virus-Scanned: ClamAV using ClamSMTP Action: drop User: clamav
- Start the daemons
rc-update add clamd rc-update add clamsmtpd /etc/init.d/clamd start /etc/init.d/clamsmtpd start
- Verify clamsmtp is listening on port 10025:
netstat -anp | grep clamsmtp
- Following the clamsmtp instructions
- edit /etc/postfix/main.cf and add:
content_filter = scan:[127.0.0.1]:10025
- edit /etc/postfix/master.cf and add
# AV scan filter (used by content_filter)
scan unix - - n - 16 smtp
-o smtp_send_xforward_command=yes
-o smtp_enforce_tls=no
# For injecting mail back into postfix from the filter
127.0.0.1:10026 inet n - n - 16 smtpd
-o content_filter=
-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
-o smtpd_helo_restrictions=
-o smtpd_client_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks_style=host
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
- postfix reload
- Send and email into a local virtual domain - it should have the X-Virus-Scanned: ClamAV using ClamSMTP header.
Relay for Authenticated Users
As configured above, the mail server accepts email from the Internet, but it does not relay email. If it is a perimeter exchanger for a protected network, then you can add the protected networks to the mynetworks configuration line in /etc/postfix/main.cf
This configuration change allows remote users to authenticate against the mail server and relay through it. The rules for relaying are:
- Only authenticated users can relay
- Authentication Credentials must be encrypted with TLS or SSL
- Allow Submission and SMTPS ports for relaying (many consumer networks block port 25 - SMTP by default)
The process uses the dovecot authentication mechanism (used with IMAPS) to authenticate users before they are allowed to relay through postfix.
- Edit /etc/dovecot/dovecot.conf and add teh following inside the auth default stanza:
# this is for postfix SASL (authenticated users can relay through us)
socket listen {
client {
path = /var/spool/postfix/private/dovecot-auth.sock
mode = 0660
user = postfix
group = postfix
}
}
}
- Restart dovecot
/etc/init.d/dovecot restart
- Edit /etc/postfix/main.cf and add:
# TLS Stuff -- since we allow SASL with tls *only*, we have to set up TLS first smtpd_tls_cert_file = /etc/lighttpd/server-bundle.pem smtpd_tls_key_file = /etc/lighttpd/server-bundle.pem smtpd_tls_CAfile = /etc/lighttpd/ca-crt.pem # If tls_security_level is set to "encrypt", then SMTP rejects # unencrypted email (e.g. normal mail) which is bad. # By setting it to "may" you get TLS encrypted mail from google, slashdot, and other # interesting places. Check your logs to see who smtpd_tls_security_level = may # Log info about the negotiated encryption levels smtpd_tls_received_header = yes smtpd_tls_loglevel = 1 # SASL - this allows senders to authenticiate themselves # This along with "permit_sasl_authenticated" in smtpd_recipient_restrictions allows relaying smtpd_sasl_type = dovecot smtpd_sasl_path = private/dovecot-auth.sock smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_tls_auth_only = yes
- Edit /etc/postfix/master.cf and enable the submission and smtps transports. They are probably already at the top of your master.cf file, just commented out:
submission inet n - n - - smtpd -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING smtps inet n - n - - smtpd -o smtpd_tls_security_level=encrypt -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING
- Verfiy submission and smtps are defined in /etc/services
grep "submission\|ssmtp" /etc/services submission 587/tcp # mail message submission submission 587/udp smtps 465/tcp ssmtp # smtp protocol over TLS/SSL smtps 465/udp ssmtp
- Restart postfix
postfix reload
At this point, you should be able to set up a mail client to relay through the server with TLS (port 587) or SSL (port 465) Note that "plain" authentication is used because the underlying link is encrypted. For example, in Thunderbird leave "secure authentication" unchecked, and choose STARTTLS (or TLS) for the connection security.
Mailbox Quotas
In the default configuration, PostfixAdmin knows about quotas, but they are not enforced. Documentation on the web mentions the vda patch to postfix to enforce quotas. The only bad thing... its a patch. Postfix and Dovecot are both conservative systems, so if the patch isn't in the upstream source, we'll assume there's a good reason. There is a way of using quotas without patches - and it involves using dovecot's deliver lda for local delivery.
Note: As of Jan 2010, the documention is confusing, with multiple versions of dovecot, PostfixAdmin, and Mysql referenced. These instructions apply to:
- Postgresql 8.4.2
- PostfixAdmin 2.3
- Dovecot 1.2.11
- Postfix 2.6.5
Presumably later versions will work the same, but if not, please update the documentation and versions above.
- Update /etc/dovecot/dovecot.conf (old lines shown commented out):
# old postfix
# userdb static {
# args = uid=1006 gid=1006 home=/var/mail/domains/%d/%n
# }
# new quota support:
userdb prefetch {
}
userdb sql {
args = /etc/dovecot/dovecot-sql.conf
}
socket listen {
client {
path = /var/spool/postfix/private/dovecot-auth.sock
mode = 0660
user = postfix
group = postfix
}
# These lines below are for the deliver lda
master {
path = /var/run/dovecot/auth-master
mode = 0660
user = vmail
group = vmail
}
}
}
protocol imap {
mail_plugins = quota imap_quota
}
protocol pop3 {
mail_plugins = quota
}
dict {
quotadict = pgsql:/etc/dovecot/dovecot-dict-quota.conf
}
plugin {
quota = dict:user::proxy::quotadict
}
protocol lda {
postmaster_address = postmaster@host.example.com
mail_plugins = quota
auth_socket_path = /var/run/dovecot/auth-master
sendmail_path = /usr/sbin/sendmail
}
You should already have a socket-> listen-> client section, but it is listed above to show where it goes in relationship to the socket -> listen -> master section
- edit /etc/dovecot/dovecot-sql.conf and replace the user and password queries with the following (you may not have a user_query yet - add it):
password_query = select username as user, password, 1006 as userdb_uid, 1006 as userdb_gid, '*:bytes=' || quota as userdb_quota_rule from mailbox where local_part = '%n' and domain = '%d' user_query = select '/var/mail/domains/' || maildir as home, 1006 as uid, 1006 as gid, '*:bytes=' || quota as quota_rule from mailbox where local_part = '%n' and domain ='%d'
- create /etc/dovecot/dovecot-dict-quota.conf
connect = host=localhost dbname=postfix user=postfix password=********
map {
pattern = priv/quota/storage
table = quota2
username_field =username
value_field = bytes
}
map {
pattern= priv/quota/messages
table = quota2
username_field = username
value_field = messages
}
Again, change the password above to your postfix user password, and protect the file from prying eyes:
chown root:root /etc/dovecot/dovecot-dict-quota.conf chmod 600 /etc/dovecot/dovecot-dict-quota.conf
Side note: The Dovecot Quota Documentation mentions the need for a trigger with pgsql. This was created in the PostfixAdmin install, which is why you instantiated the pgsql language when creating the database. If not, you will need to create the trigger, to reference the quota2 table, not the quota table mentioned in the dovecot docs.
- create a new transport for the dovecot lda. Add the following to /etc/postfix/master.cf:
# The dovecot deliver lda
dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${user}@${nexthop}
- Edit the /etc/postfix/main.cf. Replace
virtual_transport = virtual
with
virtual_transport = dovecot dovecot_destination_recipient_limit = 1
Change permissions on the /var/log/dovecot* log files, so that the vmail user can write to them:
chown vmail:vmail /var/log/dovecot*
Restart Postfix and Dovecot:
/etc/init.d/postfix restart /etc/init.d/dovecot restart
TODO This will cause over-quota emails to bounce. Which could be a source of backscatter. We need a way of checking quota limits after RBL checking but before the message is accepted in the queue.
WebMail (RoundCube)
RoundCube is an "ajax /Web2.0" web-mail client. These instructions are for the Alpine Linux 1.10 repository
- Verify that you have at least the following in /etc/postfix/main.cf. Unless you have followed the Relay for Authenticated Users section above, set smtpd_tls_auth_only = no, otherwise leave it set to yes:
# SASL - this allows senders to authenticiate themselves # This along with "permit_sasl_authenticated" in smtpd_recipient_restrictions allows relaying smtpd_sasl_type = dovecot smtpd_sasl_path = private/dovecot-auth.sock smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes # Set the next line to no if TLS auth is not configured smtpd_tls_auth_only = no
- Ensure you have this section in /etc/dovecot/dovecot.conf, inside the auth default stanza:
# this is for postfix SASL (authenticated users can relay through us)
socket listen {
client {
path = /var/spool/postfix/private/dovecot-auth.sock
mode = 0660
user = postfix
group = postfix
}
}
}
- Restart the relevant services:
/etc/init.d/postfix restart /etc/init.d/dovecot restart
- Add the package and related php modules:
apk add roundcubemail php-xml php-openssl php-mcrypt php-gd php-iconv
- link the roundcube application back into the docroot
ln -s /usr/share/webapps/roundcube /var/www/domains/host.example.com/www/roundcube
- follow the instructions in /usr/share/webapps/roundcube/INSTALL:
cd /usr/share/webapps/roundcube chown -R lighttpd:lighttpd temp logs su postgres createuser roundcube Shall the new role be a superuser? (y/n) n Shall the new role be allowed to create databases? (y/n) n Shall the new role be allowed to create more new roles? (y/n) y createdb -O roundcube -E UNICODE -T template0 roundcubemail psql roundcubemail roundcubemail=# ALTER USER roundcube WITH PASSWORD 'the_new_password'; roundcubemail=# \c - roundcube roundcubemail=> \i /usr/share/webapps/roundcube/SQL/postgres.initial.sql roundcubemail=> \q exit
- edit /etc/php/php.ini and set date.timezone to your local timezone, or to UTC
- restart lighttpd to verify the new php libraries are used
/etc/init.d/lighttpd restart
- Point your browser to http://host.example.com/roundcube/installer
- Start installation
For the specific configuration parameters in the install step:
| Property | Setting |
|---|---|
| enable_spellcheck | disabled |
| identities_level | one identity with possibility to edit all params but not email address |
| log driver | syslog |
| sylog_id | roundcube |
| syslog_facility | mailsubsystem |
| db_dnsw | pgsql properties, as described above |
| imap_host | 127.0.0.1 |
| auto_create_user | enabled |
| smtp_server | 127.0.0.1 |
| smtp_port | 25 |
| smtp_user/smtp_pass | enable Use Current IMAP username and password for SMTP authentication |
| smtp_log | enable (optional, but gives additional log record) |
The other items can be left at default settings, or adjusted if desired.
- Follow the instructions in step 3 of the install to copy the files to the server
- You should now be able to get to roundcube at http://host.example.com/roundcube
After its working, the INSTALL file recommends removing the install directory. If you want to keep the installer around later, you can simply change the ownership and permissions. So do one of the following:
cd /usr/share/webapps/roundcube rm -rf LICENSE UPGRADING INSTALL README CHANGELOG SQL installer
or
cd /usr/share/webapps/roundcube chown -R root:root LICENSE UPGRADING INSTALL README CHANGELOG SQL installer chmod -R 600 LICENSE UPGRADING INSTALL README CHANGELOG SQL chmod 700 SQL installer
Enable Plug-ins
RoundCube has various useful plug-ins, which could be found in /usr/share/webapps/roundcube/plugins directory. For example you may want to enable password plug-in to let users change their passwords directly from RoundCube using an extra Password Tab added to User Settings.
- Grant limited permissions for roundcube database role
psql -U postgres postfix postfix=# GRANT UPDATE (password,modified) ON mailbox TO roundcube; postfix=# GRANT SELECT (username) ON mailbox TO roundcube; postfix=# GRANT INSERT ON log TO roundcube; postfix=# \q
- Setup password plug-in parameters in /usr/share/webapps/roundcube/plugins/password/config.inc.php
mv /usr/share/webapps/roundcube/plugins/password/config.inc.php.dist /usr/share/webapps/roundcube/plugins/password/config.inc.php vi /usr/share/webapps/roundcube/plugins/password/config.inc.php
$rcmail_config['password_minimum_length'] = 7;
$rcmail_config['password_require_nonalpha'] = true;
...
$rcmail_config['password_db_dsn'] = 'pgsql://roundcube:<roundcube_password>@localhost/postfix';
...
$rcmail_config['password_query'] = "UPDATE mailbox set password = %c, modified = NOW() where username = %u; INSERT INTO log (timestamp,username,domain,action,data) VALUES (NOW(),%u || ' (' || %h || ')',%d,'edit_password',%u)";
- Enable password plug-in
vi /usr/share/webapps/roundcube/config/main.inc.php
...
$rcmail_config['plugins'] = array('password');
OpenLDAP based Address Book
This OpenLDAP configuration uses the SQL backend, which represents information stored in PostgreSQL as an LDAP subtree for Address Book functionality for email lookups, user authentication or even replication account information between sites. This procedure uses some metainformation to translate LDAP queries to SQL queries, leaving relational schema untouched, which allows SQL and LDAP applications to inter-operate without replication, and exchange data as needed. The SQL backend uses UnixODBC to connect to PostgresSQL.
- Install OpenLDAP and ODBC
apk add openldap libldap openldap-back-sql php-ldap unixodbc psqlodbc ca-certificates
Note: The psqlodbc package is currently unavailable
- Update "postfix" database (it will add 'id' columns to mailbox and domain tables, also will create tables and views to represent LDAP metainformation)
Note: These instructions are for example domain example.com. So make sure you replaced all entries of 'example' and 'com' according to your domain name parts.
Put the following into a new file called script:
ALTER TABLE domain ADD COLUMN id SERIAL;
ALTER TABLE mailbox ADD COLUMN id SERIAL;
CREATE TABLE ldap_entry_objclasses (
entry_id integer NOT NULL,
oc_name character varying(64)
);
CREATE TABLE ldap_oc_mappings (
name character varying(64) NOT NULL,
keytbl character varying(64) NOT NULL,
keycol character varying(64) NOT NULL,
create_proc character varying(255),
delete_proc character varying(255),
expect_return integer NOT NULL
);
ALTER TABLE ldap_oc_mappings ADD COLUMN id SERIAL;
ALTER TABLE ldap_oc_mappings ADD PRIMARY KEY (id);
CREATE TABLE ldap_attr_mappings (
oc_map_id integer NOT NULL REFERENCES ldap_oc_mappings(id),
name character varying(255) NOT NULL,
sel_expr character varying(255) NOT NULL,
sel_expr_u character varying(255),
from_tbls character varying(255) NOT NULL,
join_where character varying(255),
add_proc character varying(255),
delete_proc character varying(255),
param_order integer NOT NULL,
expect_return integer NOT NULL
);
ALTER TABLE ldap_attr_mappings ADD COLUMN id SERIAL;
ALTER TABLE ldap_attr_mappings ADD PRIMARY KEY (id);
CREATE VIEW ldap_dcs AS
((SELECT (domain.id + 100000) AS id,
('dc='::text || replace((domain.domain)::text, '.'::text, ',dc='::text)) AS dn,
1 AS oc_map_id,
100000 AS parent,
0 AS keyval,
domain.domain
FROM domain
WHERE domain.domain <> 'ALL')
UNION
(SELECT 100000 AS id,
('dc=' || regexp_replace((domain.domain)::text, '.*\\.', ''::text)) AS dn,
1 AS oc_map_id,
0 AS parent,
0 AS keyval,
(regexp_replace((domain.domain)::text, '.*\\.', ''::text)) AS domain
FROM domain
WHERE domain.domain <> 'ALL'
LIMIT 1));
CREATE VIEW ldap_entries AS
SELECT mailbox.id,
((('cn='::text || initcap(replace(split_part((mailbox.username)::text, '@'::text, 1), '.'::text, ' '::text))) || ',dc='::text) ||
replace(regexp_replace((mailbox.username)::text, '.*@', ''::text), '.'::text, ',dc='::text)) AS dn,
1 AS oc_map_id,
(SELECT ldap_dcs.id
FROM ldap_dcs
WHERE ((ldap_dcs.domain)::text = (mailbox.domain)::text)) AS parent,
mailbox.id AS keyval
FROM mailbox
UNION
SELECT ldap_dcs.id,
ldap_dcs.dn,
ldap_dcs.oc_map_id,
ldap_dcs.parent,
ldap_dcs.keyval
FROM ldap_dcs;
Finally, execute the commands in the file with:
cat script | psql -U postfix postfix rm script
- Fill out LDAP tables according to following example (make sure to separate values with TABs):
Put the following into a new file called script:
COPY ldap_oc_mappings (id, name, keytbl, keycol, create_proc, delete_proc, expect_return) FROM stdin;
1 exampleBox mailbox id \N \N 1
\.
COPY ldap_attr_mappings (id, oc_map_id, name, sel_expr, sel_expr_u, from_tbls, join_where, add_proc, delete_proc, param_order, expect_return) FROM stdin;
1 1 displayName mailbox.name \N mailbox \N \N \N 3 0
2 1 mail mailbox.username \N mailbox \N \N \N 3 0
3 1 cn mailbox.name \N mailbox \N \N \N 3 0
4 1 userPassword '{CRYPT}'||mailbox.password \N mailbox \N \N \N 3 0
\.
Finally, execute the commands in the file with:
cat script | psql -U postfix postfix rm script
- Check that "ldap_dcs" view looks something like this:
echo 'select * from ldap_dcs' | psql -U postgres postfix
id | dn | oc_map_id | parent | keyval | domain --------+-----------------------------+-----------+--------+--------+-------------------- 100000 | dc=com | 1 | 0 | 0 | com 100001 | dc=example,dc=com | 1 | 100000 | 0 | example.com
- Check that "ldap_entries" view looks something like this:
echo 'select * from ldap_entries' | psql -U postgres postfix
id | dn | oc_map_id | parent | keyval
--------+-------------------------------------------------------+-----------+--------+--------
1 | cn=address1,dc=example,dc=com | 1 | 100001 | 1
...
123 | cn=address123,dc=example,dc=com | 1 | 100001 | 1
100000 | dc=com | 1 | 0 | 0
100001 | dc=example,dc=com | 1 | 100000 | 0
- Configure ODBC parameters
Edit /etc/odbc.ini:
[PostgreSQL] Description = Connection to Postgres Driver = PostgreSQL Trace = Yes TraceFile = sql.log Database = postfix Servername = 127.0.0.1 UserName = Password = Port = 5432 Protocol = 6.4 ReadOnly = No RowVersining = No ShowSystemTables = No ShowOidColumn = No FakeOidIndex = No ConnSettings =
Edit /etc/odbcinst.ini:
[PostgreSQL] Description = PostgreSQL driver for Linux Driver = /usr/lib/psqlodbcw.so Setup = /usr/lib/libodbcpsqlS.so FileUsage = 1
- Test ODBC connection
echo "select * from domain;" | isql PostgreSQL postgres
- Provide permission to certificate for LDAP server
chown ldap /etc/lighttpd/server-bundle.pem
- Edit LDAP schema
Edit /etc/openldap/schema/example.com.schema:
attributetype ( 0.9.2342.19200300.100.1.3
NAME ( 'mail' 'rfc822Mailbox' )
DESC 'RFC1274: RFC822 Mailbox'
EQUALITY caseIgnoreIA5Match
SUBSTR caseIgnoreIA5SubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.26{256} )
attributetype ( 2.16.840.1.113730.3.1.241
NAME 'displayName'
DESC 'RFC2798: preferred name to be used when displaying entries'
EQUALITY caseIgnoreMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
SINGLE-VALUE )
objectclass ( 2.16.840.1.113730.3.2.2
NAME 'exampleBox'
DESC 'example.com mailbox'
MUST ( displayName $ mail $ userPassword )
)
# RFC 1274 + RFC 2247
attributetype ( 0.9.2342.19200300.100.1.25
NAME ( 'dc' 'domainComponent' )
DESC 'RFC1274/2247: domain component'
EQUALITY caseIgnoreIA5Match
SUBSTR caseIgnoreIA5SubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 SINGLE-VALUE )
attributetype ( 2.5.4.46 NAME 'dnQualifier'
DESC 'RFC2256: DN qualifier'
EQUALITY caseIgnoreMatch
ORDERING caseIgnoreOrderingMatch
SUBSTR caseIgnoreSubstringsMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.44 )
- Configure LDAP server
Edit /etc/openldap/slapd.conf:
include /etc/openldap/schema/example.com.schema
pidfile /var/run/openldap/slapd.pid
argsfile /var/run/openldap/slapd.args
TLSCipherSuite HIGH
TLSCACertificateFile /etc/lighttpd/ca-crt.pem
TLSCertificateFile /etc/lighttpd/server-bundle.pem
TLSCertificateKeyFile /etc/lighttpd/server-bundle.pem
TLSVerifyClient never
# This is needed for proper representation of MD5-CRYPT format stored in database
# see more details in http://strugglers.net/~andy/blog/2010/01/23/openldap-and-md5crypt/
password-hash {CRYPT}
password-crypt-salt-format "$1$%.8s"
loglevel stats
moduleload /usr/lib/openldap/back_sql.so
sizelimit 3000
database sql
dbname PostgreSQL
dbuser postfix
dbpasswd *****
suffix "dc=example,dc=com"
upper_func "upper"
strcast_func "text"
concat_pattern "?||?"
has_ldapinfo_dn_ru no
lastmod off
access to attrs=userPassword by * auth
access to * by peername.ip=127.0.0.1 read
# by peername.ip=<IP>%<netmask> read
# by peername.ip=<IP> read
by users read
- Set permissions for slapd.conf
chown ldap:ldap /etc/openldap/slapd.conf
- Configure startup parameters to make sure that LDAP server start AFTER PostgreSQL and listens on localhost with clear text and public IP with SSL
Edit /etc/conf.d/slapd:
rc_need="postgresql" OPTS="-h 'ldaps:// ldap://127.0.0.1'"
- Start LDAP server
rc-update add slapd default /etc/init.d/slapd start
- Configure LDAP client utilities
Edit /etc/openldap/ldap.conf
BASE dc=example,dc=com URI ldaps://host.example.com TLS_CACERT /etc/lighttpd/ca-crt.pem TLS_CERT /etc/lighttpd/server-bundle.pem TLS_KEY /etc/lighttpd/server-bundle.pem
- Test LDAP server
ldapsearch -z 3 ldapsearch -z 3 -x -W -D cn=admin,dc=example,dc=com ldapsearch -z 3 -x -W -D cn=address1,dc=example,dc=com
- Configure RoundCube webmail for email lookups
In order to enable php-ldap support you need to restart lighttpd server
/etc/init.d/lighttpd restart
Edit /usr/share/webapps/roundcube/config/main.inc.php:
$rcmail_config['ldap_debug'] = false;
...
$rcmail_config['address_book_type'] = 'sql';
$rcmail_config['ldap_public']['example.com'] = array(
'name' => 'example.com',
'hosts' => array('127.0.0.1'),
'port' => 389,
'use_tls' => false,
'user_specific' => false,
'base_dn' => 'dc=example,dc=com',
'bind_dn' => '',
'bind_pass' => '',
'writable' => false,
'LDAP_Object_Classes' => array("top", "exampleBox"),
'required_fields' => array("cn", "sn", "mail"),
'LDAP_rdn' => 'mail',
'ldap_version' => 3,
'search_fields' => array('mail', 'cn', 'sn', 'givenName'),
'name_field' => 'cn',
'email_field' => 'mail',
'surname_field' => 'sn',
'firstname_field' => 'gn',
'sort' => 'cn',
'scope' => 'sub',
'filter' => '(objectClass=*)', // Construct here any filter you need
'fuzzy_search' => true);
$rcmail_config['autocomplete_addressbooks'] = array('sql','example.com');
- Fix PostfixAdmin to work with the new table definition
Edit /var/www/domains/example.com/www/postfixadmin/list-domain.php. Replace the line:
SELECT domain.* , COUNT( DISTINCT mailbox.username ) AS mailbox_count
With the lines:
SELECT domain.domain, domain.description, domain.aliases, domain.mailboxes, domain.maxquota, domain.quota, domain.transport, domain.backupmx, domain.created, domain.modified, domain.active, COUNT( DISTINCT mailbox.username ) AS mailbox_count
log rotation
Ensure the busybox cron service is started and is configured to auto-start:
/etc/init.d/cron start rc-update add cron default
Add log rotate:
apk add logrotate
Edit /etc/logrotate.conf as desired, but the defaults should be sufficient for most people.
Optional: Configure Web Server Virtual Domains
Note: These steps can be done in addition to the default lighttpd configuration above, which allows you to access the ACF, PostfixAdmin and Roundcube interfaces as subfolders of one web service.
Note: If you provide SSL access for multiple domain site you may need to follow http://redmine.lighttpd.net/projects/lighttpd/wiki/Docs:SSL#SSL-on-multiple-domains in order to provide multi-domain certificates. If you would like to redirect hosts to their secure equivalents use the following instructions http://redmine.lighttpd.net/projects/lighttpd/wiki/HowToRedirectHttpToHttps.
This server hosts three separate web applications, and these can be handled as three different virtual domains on the same web server. They will be distinguished by their DNS names, so you can choose domains for the three separate services (or at least the ones you want to publish):
- ACF - Alpine Configuration Framework for managing the server
- PostfixAdmin - for managing the postfix installation
- RoundCube - for accessing individual mailboxes
Choose three different domains (from here on known as ACF_DOMAIN, POSTFIXADMIN_DOMAIN, and ROUNDCUBE_DOMAIN) and configure DNS for all three to point to the IP address of your host. These should be DNS A records.
Then, configure lighttpd to handle the three separate domains by editing /etc/lighttpd/lighttpd.conf:
$HTTP["host"] == "ACF_DOMAIN" {
simple-vhost.server-root = "/var/www/domains/"
simple-vhost.default-host = "/ACF_DOMAIN/"
simple-vhost.document-root = "www/"
}
$HTTP["host"] == "POSTFIXADMIN_DOMAIN" {
simple-vhost.server-root = "/var/www/domains/"
simple-vhost.default-host = "/POSTFIXADMIN_DOMAIN/"
simple-vhost.document-root = "www/"
}
$HTTP["host"] == "ROUNDCUBE_DOMAIN" {
simple-vhost.server-root = "/var/www/domains/"
simple-vhost.default-host = "/ROUNDCUBE_DOMAIN/"
simple-vhost.document-root = "www/"
}
And, then link the appropriate www directories.
mkdir -p /var/www/domains/ACF_DOMAIN ln -s /usr/share/acf/www /var/www/domains/ACF_DOMAIN/www mkdir -p /var/www/domains/POSTFIXADMIN_DOMAIN ln -s /var/www/domains/host.example.com/www/postfixadmin /var/www/domains/POSTFIXADMIN_DOMAIN/www mkdir -p /var/www/domains/ROUNDCUBE_DOMAIN ln -s /usr/share/webapps/roundcube /var/www/domains/ROUNDCUBE_DOMAIN/www