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marlam / msmtp

SMTP client with sendmail compatible interface
https://marlam.de/msmtp
GNU General Public License v3.0
176 stars 36 forks source link

Listen to several interfaces #138

Closed azmeuk closed 1 year ago

azmeuk commented 1 year ago

I have been meeting a situation where I would have loved if msmtp listened on several interfaces.

I have a cluster of hypervisors. They have proprietary management interfaces (HP iLO, Dell IDRAC) that are plugged on a private offline network. The hypervisors OSes are connected to both this offline network and another online network, so they can go on the internet.

I would like to configure the management interfaces to send alert mails (on hardware failure for instance). As they are offline, they must use a mail relay to actually send the mails.

Thus, I would like to install msmtp on the hypervisors, and make it listen to that offline network interface. However, I would like to not unplug msmtp from 127.0.0.1 so local process can still send mails.

I suggest allowing msmtp to listen on several interfaces.

What do you think?

marlam commented 1 year ago

Yes, msmtpd could be extended to be able to listen on multiple interfaces. In the meantime, you can work around this by simply starting multiple instances of msmtpd, one for each interface.