On Tue, Jun 16, 2015 at 10:01:52PM -0400, Steve Matzura wrote:
> I'm the de facto email administrator for a small Fedora 20 system,
> going to uprade to 22 shortly, with Postfix and Dovecot supposedly
> configured to work together.
Sadly, you have a steep learning curve, as email infrastructure
has continued to evolve (get more complex) over the last 4 decades.
> Using LMTP for both components.
Instead of telling a story, be the remote eyes of the person who
is trying to help you and let that person come to his/her own
conclusions. Post the relevant configuration details and logs.
If you've configured Dovecot to receive email via LMTP and Postfix
to deliver to Dovecot via LMTP, since this is the Postfix mailing
list, show the relevant Postfix configuration settings and logs
of a delivery via LMTP to Dovecot.
> I can
> telnet from within and without my server on port 143 for Dovecot and
> 25 for Postfix successfully, although I have nothing specifically set
> in main.cf for what ports to listen on.
Postfix listens on port 25, becase that's what "smtp inet" means,
with "smtp 25/tcp" found in /etc/services on almost all systems.
> Maybe that's where LMTP comes in?
LMTP is a protocol between the Postfix MTA and the Dovecot Mailstore,
it is neither port 25 (inbound SMTP email) nor 143 (IMAP access).
By default it uses port 25, but your configuration can use any
port at will by overriding that.
> My problem is that when I send a message to the server, it never shows
> up. A few hours later, I get a level 4 SMTP retry failure count
> exceeded, the message has been in queue too long, etc. I'm presuming
> something on my server is set up wrong, and it's probably something in
> main.cf. Ideas of what to check and change greatly appreciated.
Remote eyes/ears:
http://www.postfix.org/DEBUG_README.html#logging
http://www.postfix.org/DEBUG_README.html#mail
No anecdotes, just the facts.
--
Viktor.
