Connection timed out and delivery temporarily suspended:

akashhalder3

Hi everyone, I’m facing an issue with Mailcow and would appreciate some help.

Problem:

The Queue Manager has over 80 messages stuck, mostly for domains like @yahoo.co.in and @gmail.com.
I’m consistently getting errors like:
- connect to mx-apac.mail.gm0.yahoodns.net[106.10.248.74]:25: Connection timed out
- delivery temporarily suspended: connect to alt2.gmail-smtp-in.l.google.com[2607:f8b0:400e:c17::1b]:25: Connection timed out

Has anyone else faced this? Is this related to IPv6 issues, rate limiting, or something else like a firewall or provider block?

Any guidance would be really appreciated!

esackbauer

I think your internet/hosting provider has blocked port 25 outgoing for you.

akashhalder3

Actually, all outgoing mails are sent successfully under normal conditions.
However, when I try to send 5 to 6 emails simultaneously, two specific issues occur. As a result, all emails in the queue show a “deferred” status.

esackbauer

Still could be your provider, maybe you are on a residential line and provider thinks you are trying to mass mail.