I have a service in Postfix but now the messages are not being delivered checked the mail queued and find that Gmail and Hotmail is rejecting my deliveries and I have marked as SPAM, do not use my drop to send spam, just personal mailings.
That I can do to fix it?
1EC48449F0 2454124 Wed Jun 17 22:08:07 email@example.com (host mx2.hotmail.com[184.108.40.206] said: 550 SC-002 (SNT004-MC1F9) Unfortunately, messages from XXX.XXX.XXX.XXX weren’t sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL FROM command))
115B544456 1620 Wed Jun 17 10:32:59 firstname.lastname@example.org (host aspmx.l.google.com[220.127.116.11] said: 550-5.7.1 [XXX.XXX.XXX.XXX] Our system has detected that this message is 550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to Gmail, 550-5.7.1 this message has been blocked. Please visit 550 5.7.1 https://support.google.com/mail/answer/188131 for more information. w53si5629300qge.37 - gsmtp (in reply to end of DATA command))
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.