Resolved Unable to send mails via php (18.0.34 fresh install)

[Vince]

Hi,

I have an issue with a new server (Plesk 18.0.34 fresh install on a Ubuntu 20.04 server) when i try to send mails via PHP (not via smtp).
I think it's not a problem related to PHP because emails are showing up on the mail queue.
As a result, mail queue is growing.... but 0 mail really sent.

Here are some additionnal informations found in maillogs (Example for 1 email, but logs are identical for all emails) :

grep "E03CE45E78" /var/log/maillog
Mar 16 10:38:20 srv postfix/pickup[125987]: E03CE45E78: uid=10000 from=<[email protected]>
Mar 16 10:38:20 srv postfix/cleanup[126335]: E03CE45E78: message-id=<[email protected]>
Mar 16 10:38:20 srv postfix/qmgr[125988]: E03CE45E78: from=<[email protected]>, size=2791, nrcpt=1 (queue active)
Mar 16 10:40:21 srv postfix/smtp[126338]: E03CE45E78: to=<[email protected]>, relay=none, delay=120, delays=0.02/0.01/120/0, dsn=4.4.1, status=deferred (connect to mx3.mail.ovh.net[91.121.53.175]:25: Connection timed out)
Mar 16 10:47:53 srv postfix/qmgr[125988]: E03CE45E78: from=<[email protected]>, size=2791, nrcpt=1 (queue active)
Mar 16 10:49:54 srv postfix/smtp[126452]: E03CE45E78: to=<[email protected]>, relay=none, delay=693, delays=573/0.02/120/0, dsn=4.4.1, status=deferred (connect to mx3.mail.ovh.net[91.121.53.175]:25: Connection timed out)
Mar 16 11:02:53 srv postfix/qmgr[125988]: E03CE45E78: from=<[email protected]>, size=2791, nrcpt=1 (queue active)
Mar 16 11:04:53 srv postfix/smtp[126878]: E03CE45E78: to=<[email protected]>, relay=none, delay=1593, delays=1473/0.02/120/0, dsn=4.4.1, status=deferred (connect to mx3.mail.ovh.net[91.121.53.175]:25: Connection timed out)
Mar 16 11:32:53 srv postfix/qmgr[125988]: E03CE45E78: from=<[email protected]>, size=2791, nrcpt=1 (queue active)
Mar 16 11:34:53 srv postfix/smtp[130200]: E03CE45E78: to=<[email protected]>, relay=none, delay=3393, delays=3273/0.04/120/0, dsn=4.4.1, status=deferred (connect to mx3.mail.ovh.net[91.121.53.175]:25: Connection timed out)

An to be more precise, i've tried to send email to another mailbox (to be sure it's not ovh mx server problem) but same thing :

[...]
Mar 16 11:38:53 srv postfix/error[130252]: 9143747DD4: to=<[email protected]>, relay=none, delay=94396, delays=94335/60/0/0.01, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to mx00.1and1.fr[212.227.15.41]:25: Connection timed out)

What i've tried :
Enabling / Disabling again mail service for the domain (But not working)
(It has to be disabled, mails for the domain are not handeled by plesk server).

Is that a known issue and is there a fix ?

Server is configured exactly the same way as other Plesk server i have (on Centos7, plesk 18.0.34), where i don't encouter this issue.
So i don't understand what could be the problem.

Thanks in advance for the help

 

[Kaspar]

Are you using OVH by any chance? If my memory serves me right they block port 25 by default, which is why you cannot send email. See also  Unable to send emails using Plesk local mail server: Connection timed out or connection refused. (#4.4.1)

Or contact OVH support.

 

[Vince]

Thanks a lot for your reply, it helped a lot !

The provider is Ovh not but Ionos, and after some search, they are effectively blocking outgoing port 25.
The only way to unlock is to call the support, what i've done.

Mail queue is now begining to be processed.

Thanks again.