Hi , Im using the latest version of mailcow,
i have my own domain that is worked more than one year correctly, but now i have 2 days that i cant send mails from my domain to Gmails.
I get error like:
This is the mail system at host mailserver.netgen.gr.
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
<baspax1@gmail.com>: host gmail-smtp-in.l.google.com[173.194.79.27] said:
550-5.7.1 [38.242.140.28 19] Our system has detected that this message
is 550-5.7.1 likely suspicious due to the very low reputation of the
sending 550-5.7.1 domain. To best protect our users from spam, the message
has been 550-5.7.1 blocked. Please visit 550 5.7.1
https://support.google.com/mail/answer/188131 for more information.
w6-20020a17090633c600b00987d26a0998si12388727eja.455 - gsmtp (in reply to
end of DATA command)
i didnt change anything on my setup, and look like everything good about dns setup and mail-tester
https://prnt.sc/_B0sQe3jtdYi
https://prnt.sc/Nxo6ccwrZpPN
Please what else can i do to can send in gmail users?