Mail is queuing and not being sent out

[firsttiger (Kelvin Kang)]

NethServer Version: 7.6.1819
Module: Sogo

I’ve been trying to set up my mail server using Roundcube and I ultimately moved to Sogo. I followed the following instructions:

Howto make a simple mail server

Note This guide is fairly old. For a more complete and up-to-date guide, see the wiki at: https://wiki.nethserver.org/doku.php?id=email_protection_resources Target I would like to create a step by step howto for basic configuration of a public mail server. It might be useful for users who configure a mail server for first time then… I have an ADSL and Nethserver, how can I create a mail server? What do you need to start: Nethserver: ADSL with static IP. Any other soluti…

As a test, I tried to send the email to my gmail account but the message is not leaving the queue. I found the following in the mail log

Apr 21 18:11:22 angel postfix/qmgr[14438]: 32FCF1D37: from=<kelvin.kang@firsttiger.info>, size=1211, nrcpt=1 (queue active)
Apr 21 18:11:53 angel postfix/smtp[19249]: connect to gmail-smtp-in.l.google.com [2607:f8b0:400d:c02::1a]:25: Connection timed out
Apr 21 18:12:21 angel clamd[13313]: SelfCheck: Database status OK.
Apr 21 18:12:23 angel postfix/smtp[19249]: connect to gmail-smtp-in.l.google.com[209.85.201.27]:25: Connection timed out
Apr 21 18:12:53 angel postfix/smtp[19249]: connect to alt1.gmail-smtp-in.l.google.com [2800:3f0:4003:c02::1a]:25: Connection timed out
Apr 21 18:13:23 angel postfix/smtp[19249]: connect to alt1.gmail-smtp-in.l.google.com [172.217.192.26]:25: Connection timed out
Apr 21 18:13:53 angel postfix/smtp[19249]: connect to alt2.gmail-smtp-in.l.google.com[209.85.202.27]:25: Connection timed out
Apr 21 18:13:53 angel postfix/smtp[19249]: 32FCF1D37: to=<kelvin.kang@gmail.com>, relay=none, delay=692, delays=542/0.06/150/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com [209.85.202.27]:25: Connection timed out)

My server is hosted on a VM in the cloud.

Any suggestions?

[pike (Michael Kicks)]

Does Choopa allow use of port 25?

[robb (Rob Bosch)]

What “cloud provider” is your VM hosted?
You try to use Gmail for your mail. You have that set up correctly? I think I have read something like allowing “less safe applications” to use pop/imap/smtp with gmail?

[Jean-Sebastien_Legar (Jean-Sébastien Légaré)]

To protect the quality/reputation of IP addresses, many providers block outgoing port 25 by default.

In case your mailserver is configured on AWS, for instance, you will need to ask permission to lift that restriction on your elastic IP.

https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/