Question

Emails are being blocked by hotmail

Emails I am sending are being blocked by hotmail.

Here is the mail log error message:

to=<michaelgaocga@hotmail.com>, relay=hotmail-com.olc.protection.outlook.com[104.47.41.33]:25, delay=0.15, delays=0.01/0.01/0.1/0.04, dsn=5.7.1, status=bounced (host hotmail-com.olc.protection.outlook.com[104.47.41.33] said: 550 5.7.1 Unfortunately, messages from [167.99.232.110] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [DM3NAM03FT023.eop-NAM03.prod.protection.outlook.com] (in reply to MAIL FROM command))
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it’s a new server. but it’s already blocked by hotmail, microsoft outlook

I’m trying my luck with https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75

Not hoping on it though - this seems like a larger issue for DigitalOcean to resolve - MS blocking entire DO IP ranges due to the amount of (spam) misuse coming from DO.

I have the same problem. The server’s ip is new. My server meets all security specifications and still hotmail blocks the ip. I tried to communicate with them but I don’t get any answers.