Office 365 email from server blocked

Posted April 3, 2019 8.1k views
EmailUbuntu 16.04

Gmail and all another email services blocked my emails from Office 365. But from goolge account all is working.

Droplet IP :

Remote Server returned ‘550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. For more information please go to AS(8561) []’
Original message headers:

Received: from
([fe80::9dda:7fcb:3108:a363]) by
([fe80::9dda:7fcb:3108:a363%6]) with mapi id 15.20.1771.011; Wed, 3 Apr 2019
14:03:35 +0000
MIME-Version: 1.0
Content-Type: text/plain
Date: Wed, 3 Apr 2019 14:03:35 +0000
Subject: Forgot password

That is answer from

What you described doing isn’t something that Office 365 supports. It’s only meant to be used to send emails from your email account or your personal email client, not a hosting server. If you are wanting to send email from your hosted site, I suggest contacting your hosting provider for suggestions.

Based on the information from the link in the error message you received, the IP (your hosting provider) is blocked from sending emails through Office 365.

1 comment

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.

Submit an Answer
1 answer


That’s interesting, thank you for bringing that question here. I’ve seen a lot of email errors, that is not one I’ve witnessed before. Fortunately, I was able to find the documentation for the solution:

This details a path to requesting that the IP be unblocked on their side. Hopefully it works for you :)


  • Thank you for answer.

    I used this manual but it did not help. Here is the answer:

    Currently specified IP address is not blocked in our system. Review the e-mail you received from Microsoft and follow the steps therein.

  • maybe this IP blocked by another services like Google, etc. but not Microsoft mail services