I use Amazon SES for emails, but sometimes I need my DO server as a backup, which needs port 25 working alright, but for gmail, I always get this Connection time out:
postqueue -p
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
14BA142B5AB 1181 Fri May 10 20:32:44 contato@culturalivre.com
(connect to alt4.gmail-smtp-in.l.google.com[142.250.153.27]:25: Connection timed out)
Could you please, allow me to work with it? Thank you!
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