I'm suddenly getting 550 errors for mail addressed to @outlook.com users claiming my mail server's IP address is on a block list and referencing S3150, which I assume is an error code. The error message also has a link to http://mail.live.com/mail/troubleshooting.aspx#errors for more information.
S3150 isn't mentioned on that page. Through a bunch of searching I have found a thing claiming to be the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/. But, when I go through the steps there I'm told my IP is not blocked. Does anyone know more about this than I do? Anyone from Outlook here that could reach out and help me figure out what's going on?
_______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
