Issue Postfix postponed queue

[Artificium]

Hi friends! I have a problem with Postfix. No email is sent to its recipients, but we can receive emails without problems. This happens with any subscription.

When I try to send after a minute it is put in postponed mail

This is the mail system at host xxxxx.xxxxxxx.cloud.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<info@xxxxx.xxx>: connect to mail.xxxxxxxx.es[xxx.xxx.xx.xxx]:25:
Connection timed out

<xxx@gmail.com>: connect to
alt2.gmail-smtp-in.l.google.com[172.253.118.26]:25: Connection timed out
Reporting-MTA: dns; xxxxx.xxxxxxx.cloud
X-Postfix-Queue-ID: EF47426EF7
X-Postfix-Sender: rfc822; info@xxxxxxxx.com
Arrival-Date: Fri, 31 Jan 2020 15:51:17 +0000 (UTC)

Final-Recipient: rfc822; info@xxxxxxxxx.com
Original-Recipient: rfc822;info@xxxxxxxxx.com
Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; connect to mail.xxxxxxxx.es[xxx.xxx.xx.xxx]:25:
Connection timed out

Final-Recipient: rfc822; xxxxxxxxxxx@gmail.com
Original-Recipient: rfc822;xxxxxxxxxxxxx@gmail.com
Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; connect to
alt2.gmail-smtp-in.l.google.com[172.253.118.26]:25: Connection timed out

Port 25 is open and 587 is also ... I have it open from Cloud Firewall and in Plesk SMTP sending is allowed ... and also not sent by Webmail ...

Can anybody help me?
Thanks!!
Regards, Jose

 

[Brujo]

what OS do you have?
see: https://support.plesk.com/hc/en-us/...to-receive-or-send-e-mails-port-25-is-blocked

 

[Artificium]

Hi! Centos 7

 

[Brujo]

So you have tested as described in the link if any external mail server is reachable or only in particular the one you mentioned and what was the result from the telnet tesst? Furthermore, both the local firewall and even a firewall of the service provider allow this.