MSMTP works for sending, but receiving is now - And why a full MTA?

Kevin -

-I’ve got Postfix running on my IT Helpdesk system and its running fine.
When I was having the smtp_recipient_restriction issue I went to the
Postfix IRC channel & they felt a full-blown MTA was overkill, so I
checked out MSMTP. My boss is uber paranoid when it comes to security so
anything I could do to reduce services that needed to be run was
desirable.
-I apologize for the repeat database question. I’d been checking the
incoming emails but that one got by me. It’s possible that is what
happened. I’ve just upped max_allowed_packet in my MySQL.ini file from
4M to 10MB. I also had disastrous luck trying to migrate MySQL to
MariaDB & thought that might have had something to do with it. I also
explicitly put MaxAttachmentSize in my RT_SiteConfig.pm and also set to
10MB. I’ll test that soon.
-I didn’t spend too long with MSMTP. It was at least good exposure to
it, as I’d never heard of it before. What’s bugging me is why I can’t
use any of the smtp_recipient_restrictions on the server. In my eyes,
those bases are already covered by our Exchange server and our Postfix
mail relay. They’ve already been configured to deal with incorrect mail
(sending out mail that isn’t from our domain, etc.) but my boss is a
die-hard security nut. Having gone through all of this now, I’m just
going to stick with Postfix on the RT server and leave the mail
protection to the others.

Thanks to everyone for the help & I apologize for the duplicate
questions.

Stephen Cena
QVII
MIS/IT Dept
850 Hudson Ave.
Rochester, NY. 14620
585-544-0450 x300
sjc@qvii.com
"Thank you for helping us help you help us all."
–For email related issues, please contact postmaster@qvii.com

Postfix IRC channel & they felt a full-blown MTA was overkill, so I

Unfortunately the Postfix folks, while well intentioned, probably don’t
understand the behaviour and requirements of RT. Rest assured that a
full blown MTA isn’t overkill here, and is indeed the recommended
practice. You can tell your paranoid-prone boss that using Postfix is
way more reliable than msmtp. He wants RT to be reliable, right? :slight_smile:

-I didn’t spend too long with MSMTP. It was at least good exposure to
it, as I’d never heard of it before. What’s bugging me is why I can’t
use any of the smtp_recipient_restrictions on the server.

You probably can. You didn’t mention what error you ran into, but it’s
likely no more than configuration error. There are many folks
knowledgeable about Postfix on this list, although Postfix config is
semi-off topic. Give #postfix (or whatever the postfix help channel is)
another shot, and come back to us if they insist on badgering about
non-postfix options rather than helping. :wink:

Thomas