Microsoft actively blocking DO IP range
Mail sent from my droplet is being returned when the recipient is MSN, Outlook or Hotmail
Mar 25 19:40:58 box postfix/qmgr: 4AFDA2036C: from=clubmanager@————-.co.uk, size=1477, nrcpt=1 (queue active)
Mar 25 19:40:58 box postfix/submission/smtpd: disconnect from localhost[127.0.0.1]
Mar 25 19:40:58 box postfix/smtp: 4AFDA2036C: to=<—————@msn.com>, relay=msn-com.olc.protection.outlook.com[126.96.36.199]:25, delay=0.67, delays=0.09/0/0.43/0.14, dsn=5.7.1, status=bounced (host msn-com.olc.protection.outlook.com[188.8.131.52] said: 550 5.7.1 Unfortunately, messages from [184.108.40.206] weren’t sent. Please contact your Internet service provider since part of their network is on our block list (AS3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM04FT006.eop-NAM04.prod.protection.outlook.com] (in reply to MAIL FROM command))
Mar 25 19:40:58 box postfix/smtp: 4AFDA2036C: lost connection with msn-com.olc.protection.outlook.com[220.127.116.11] while sending RCPT TO
Mar 25 19:40:58 box postfix/bounce: 4AFDA2036C: sender non-delivery notification: F003928C01
Mar 25 19:40:58 box postfix/qmgr: 4AFDA2036C: removed
(I redacted the source domain and destination email ———-)
I have contacted DO support and they just say maintaining reputation is hard for them and to try changing regions or using a third party to relay email.
Anyone have practical experience of this issue and how to get around it.
I have a bunch of users that are seriously unhappy at the moment!
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.×