Hello!
I have linux host (mss), who send system emails via another host - mailserver.

on that mss host i need to see also "subject" line in logfile.
mail sending on that host is organized via sendmail

in /var/maillog there is "from:" and "to:" info, but no "subject:" information.

try to dig in procmail direction, by using procmailrc in /etc/ , and even discover, what way i can get "to:" field in procmail log ( in default tehre is only "from", and "subject:"), but looks like, procmail processing only incoming mails, not outgoing?
i need outgoing mails logging too.

there is any advice in that?

Hi,

You can take a look at this thread here at LQ.

Regards

1 members found this post helpful.

Thanks, i try it, but that way require sendmail reconfiguring and restart - who was not very good, since it is very important 24/7 server.

much better be option to get logs via procmail, if it is possible...

It's not possible, because procmail is a MDA (Message Delivery Agent), meaning that it works on the recipient side.
If you want to log the mail subject on the sending side, then you need to follow the link above.
Restarting sendmail takes only 1 sec, so I don't think it's a problem. Just make sure to keep backups of the files you're going to edit.