Hey all,
So I've successfully made my Docker based, internal only,
Postfix/Dovecot container accept email from Thunderbird when I try to
send it. But those messages get stuck in the queue. As far as I can tell
Dovecot never sees them.
Here's the output of `postconf -p`:
https://gist.github.com/jerrac/d957f37b0ce24e82aa7244a0e57f41c3#file-postqueue-p-txt
The status/error appears to be "address resolver failure". That made me
think it was something with dns. But as far as I can tell, the container
can see all the dns settings it should need. I also thought it might be
because the container had a random string as a hostname, but telling
Docker to set the hostname to smtp.raygun.zat did not help.
Here's the output of some nslookup commands from within the container to
make sure dns is correct:
https://gist.github.com/jerrac/d957f37b0ce24e82aa7244a0e57f41c3#file-nslookup-txt
Here's my postconf -n:
https://gist.github.com/jerrac/d957f37b0ce24e82aa7244a0e57f41c3#file-postconf-cf
My verbose/debug maillog:
https://gist.github.com/jerrac/d957f37b0ce24e82aa7244a0e57f41c3#file-maillog-log
(which is why I'm linking directly to the gist items...) That log is
from just before I send the email via Thunderbird, to just after
Thunderbird closes the mail compose window.
The container is based on Ubuntu 20.04.
Google did not turn out to be any help. Most of the results referenced
configurations very different than mine, or were in a language I don't
know. I even tried looking at the Postfix source code, but my C skills
are effectively 0, so I didn't get any farther than finding where the
message likely came from.
Any ideas on what I'm doing wrong?
Any info I should add to my gist?
Thanks in advance for any help.
- David Reagan
