Mail queue stacking up -> timeouts

[c0ld]

Hi guys,

I've recently setup a new DirectAdmin server with my ISP. After a couple of days I started to notice (clients complaining + big mail queue in DA) that mails weren't properly received anymore. And the list kept grewing..

After some debugging with 'exim -q -V' I noticed it has something to do with timeouts. And it doesnt seem to be related to one specific mailserver/domain so I turned Configserver off to try again but with the same results...

Here's a snippet of the exim output:

[root@hellas db]# exim -q -v
LOG: queue_run MAIN
  Start queue run: pid=1180
delivering 1ZOJSp-0005Jn-MF (queue run pid 1180)
Connecting to mx101.skynet.be [195.238.20.25]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  mx101.skynet.be [195.238.20.25] Connection timed out
Connecting to mx201.skynet.be [195.238.22.25]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  mx201.skynet.be [195.238.22.25] Connection timed out
LOG: MAIN
  == [email protected] <[email protected]> R=lookuphost T=remote_smtp defer (110): Connection timed out
delivering 1ZO6Fp-0005Dd-Qi (queue run pid 1180)
Connecting to mail.photodys.com [194.250.223.130]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  mail.photodys.com [194.250.223.130] Connection timed out
LOG: MAIN
  == [email protected] <[email protected]> R=lookuphost T=remote_smtp defer (110): Connection timed out
delivering 1ZO54p-00038C-P0 (queue run pid 1180)
Connecting to relay.mynewsletterbuilder.com [208.83.141.174]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  relay.mynewsletterbuilder.com [208.83.141.174] Connection timed out
LOG: MAIN
  == [email protected] R=lookuphost T=remote_smtp defer (110): Connection timed out
delivering 1ZNfup-0006fY-Ao (queue run pid 1180)
LOG: retry_defer MAIN
  == [email protected] <[email protected]> R=lookuphost T=remote_smtp defer (-53): retry time not reached for any host
delivering 1ZNSFp-0007bK-Kf (queue run pid 1180)
Connecting to mail.ascomputer.com [24.234.50.76]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  mail.ascomputer.com [24.234.50.76] Connection timed out

Anybody has an idea what's going on and how to fix it? What other things can I try to debug this?

Thanks!

 

[toml]

Outgoing port 25 is blocked someone along the pipeline. Either on your box or by the ISP. Check your firewall first to make sure that port 25 outbound is open and if it is, then you need to ask your isp if they are blocking port 25, some are by default.

 

[c0ld]

Thanks Toml.
Finally got a response from my ISP and indeed they we're blocking port 25+587 by default for new VPS's..