Relay email to gmail (msmtp, mailx, sendmail

Overview

If you're running an alpine from stick and need a way for your program to alert you through a standard gmail account

Install msmtp

# apk add msmtp

Configuration

Create a global configuration:

Contents of /etc/msmtprc

# Set default values for all following accounts. defaults auth on tls on tls_trust_file /etc/ssl/certs/ca-certificates.crt syslog on # Gmail account gmail host smtp.gmail.com port 587 from <your email> user <your gmail account> password <your password> # Set a default account account default : gmail aliases /etc/aliases

Note: Please note I've used the syslog on to send msmtp log to syslog, yet you can use the logfile <log_file_path> if you prefer to log to a file

Note: Please note the aliases /etc/aliases, this will help for mail/sendmail to redirect email to local user (like root) to an external email

Sendmail alias

By default alpine comes with busybox sendmail, msmtp can act as a sendmail alternative including syntax and option, there I create a local.d script to overwrite the busybox link to msmtp.

Contents of /etc/local.d/msmtp-sendmail.start

#!/bin/sh ln -sf /usr/bin/msmtp /usr/bin/sendmail ln -sf /usr/bin/msmtp /usr/sbin/sendmail

Make it executable

# chmod +x /etc/local.d/msmtp-sendmail.start

and run it first time through

# /etc/local.d/msmtp-sendmail.start

Mailx and aliases

Install mailx for program that uses mail (like apcupsd for monitoring UPS events)

# apk add mailx

Create an /etc/aliases file with content:

Contents of /etc/aliases

root: <your external email where all email to root will be sent> default: <default email>

Testing

Test an email, run

echo -e "Subject: Do you love alpine?\nYes, I do!\n"

Note: root only work if you've setup /etc/aliases, otherwise put any email adress you can check instead of root

Saving the configuration

This material needs expanding ... This does't apply to a static install.

# lbu ci

Hope it helps.