Question
Microsoft actively blocking DO IP range
- Posted on March 27, 2018
- EmailUbuntu
Asked by mark730939
Mail sent from my droplet is being returned when the recipient is MSN, Outlook or Hotmail
Mail.log excerpt;
Mar 25 19:40:58 box postfix/qmgr[4566]: 4AFDA2036C: from=<clubmanager@-------------.co.uk>, size=1477, nrcpt=1 (queue active) Mar 25 19:40:58 box postfix/submission/smtpd[28496]: disconnect from localhost[127.0.0.1] Mar 25 19:40:58 box postfix/smtp[28928]: 4AFDA2036C: to=---------------@msn.com, relay=msn-com.olc.protection.outlook.com[104.47.45.33]: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[104.47.45.33] said: 550 5.7.1 Unfortunately, messages from [159.65.85.119] 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[28928]: 4AFDA2036C: lost connection with msn-com.olc.protection.outlook.com[104.47.45.33] while sending RCPT TO Mar 25 19:40:58 box postfix/bounce[28974]: 4AFDA2036C: sender non-delivery notification: F003928C01 Mar 25 19:40:58 box postfix/qmgr[4566]: 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!
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
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.
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
As far as I know, Mailgun is of no use for general mail services, eg sending SMTP from a mail server (including attachments) - its just for transactional email?
As DO mentioned, try an external service, you can use Mailgun for it, it works nicely
Something else I have found with Microsoft is they also look to see if the PTR Records are present for the server. I have run into the issue with most cloud providers including Azure and AWS.
Here is another discussion that touches on this topic… https://www.digitalocean.com/community/questions/how-do-i-setup-a-ptr-record