Applicable to:
- Plesk for Linux
Symptoms
-
Emails from a Plesk server are not sent. The following records appear in
/var/log/mailllog:CONFIG_TEXT: connect to aspmx.l.google.com[203.0.113.2]:25: Connection timed out
plesk postfix/smtp[17181]: connect to aspmx.l.google.com[2001:db8:f61:a1ff:0:0:0:80]:25: Network is unreachable
plesk postfix/smtp[17181]: connect to alt2.aspmx.l.google.com[203.0.113.2]:25: Connection timed out
plesk postfix/smtp[17181]: connect to alt2.aspmx.l.google.com[2001:db8:f61:a1ff:0:0:0:80]:25: Network is unreachable -
It is possible to connect to a remote host on port 25 using the telnet utility:
# telnet alt2.aspmx.l.google.com 25
...
Trying 74.125.28.26...
Connected to alt2.aspmx.l.google.com.
Escape character is '^]'.
220 mx.google.com ESMTP c68si1753439pfa.129 - gsmtp
Cause
A private IP address is used for outgoing emails.
Resolution
-
Go to Tools and Settings > Mail Server Settings.
-
Set Outgoing mail mode to some public IP address.
Comments
2 comments
This solved my issue of emails getting stuck on queue.
I'm using DigitalOcean as cloud provider and the Plesk package (https://marketplace.digitalocean.com/apps/plesk), as default on Tools and Settings > Mail Server Settings > Outgoing mail mode, was set to "Send from domain IP addresses".
I think in my case, as the domains are using a floating IP, the server stop sending emails. I have set the Outgoing mail mode to the droplet IP address and now is working. I have also discovered that I had other messages in queue from the date I have changed to floating IP use.
Daniel Pereyra, thank you for sharing your experience, some other Plesk users may find it helpful!
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