Ability to use other than sendmail mechanism for sending e-mails

[jose1711]

As mentioned at https://metacpan.org/pod/MIME::Lite#send MIME::Lite module provides a way to specify alternative to sendmail command for relaying the outgoing e-mails. For simplicity of configuration I tend to install msmtp on all my desktop systems. That works fine if the machine is always online but this of course may not be always true.

One of the solutions is a shell script that stores undelivered e-mail to a folder which you're supposed to regularly flush. For this to work I need to patch emailreports.pm as follows:

MIME::Lite->send('sendmail', '/usr/local/bin/msmtpq -t -oi -oem');

Thus instead of sendmail an msmtpq script is called which does some tests and finally relays the e-mail to msmtp. If unsuccessful it puts the message into outgoing queue where it waits for another connection attempt.

It would be great if monitorix gives me a chance to configure alternative sendmail program using configuration directive so that I would not need to patch it manually after each update.