Issue Plesk Mail Queue Problem

[Guilhem]

Hello,

I have a 50th mails stuck in the queue. I can't find the log files on SSH to have more information about it.
Also all the mails comes from my subdomain, my main domain looks fine to send mail.

Any idea to help me ?

 

[Guilhem]

Okay so I found the mail log here : /usr/local/psa/var/log/maillog
And what I see is, the server try to send mail on gmail smtp, I never asked for that I don't understand :

Sep 16 13:30:13 localhost postfix/smtp[124418]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c02::1b]:25: No route to host
Sep 16 13:30:14 localhost postfix/smtp[124419]: connect to gmail-smtp-in.l.google.com[74.125.71.27]:25: Connection timed out
Sep 16 13:30:14 localhost postfix/smtp[124419]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c02::1b]:25: No route to host
Sep 16 13:30:14 localhost postfix/smtp[124417]: connect to gmail-smtp-in.l.google.com[74.125.71.27]:25: Connection timed out
Sep 16 13:30:14 localhost postfix/smtp[124417]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1a]:25: No route to host
Sep 16 13:30:14 localhost postfix/smtp[124420]: connect to gmail-smtp-in.l.google.com[74.125.71.27]:25: Connection timed out
Sep 16 13:30:14 localhost postfix/smtp[124420]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c02::1b]:25: No route to host
Sep 16 13:30:14 localhost postfix/smtp[124421]: connect to gmail-smtp-in.l.google.com[74.125.71.27]:25: Connection timed out
Sep 16 13:30:14 localhost postfix/smtp[124421]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1a]:25: No route to host
Sep 16 13:30:44 localhost postfix/smtp[124418]: connect to alt1.gmail-smtp-in.l.google.com[108.177.14.27]:25: Connection timed out
Sep 16 13:30:44 localhost postfix/smtp[124418]: connect to alt1.gmail-smtp-in.l.google.com[2a00:1450:4010:c0f::1b]:25: No route to host

Where am I supposed to send this ? And why my Main Domain doesn't have this problem ?