EMail server gets blocked by Microsoft

Tue Apr 27 14:19:13 UTC 2021

Dominque,

Have you read this Microsoft guidance on email servers? It covers the most common problems, such as missing SPF records, incorrect or missing IN-ADDR DNS, etc:

https://sendersupport.olc.protection.outlook.com/pm/troubleshooting.aspx

 -mel beckman

On Apr 27, 2021, at 6:54 AM, Dominque Roux <dominique.roux at ungleich.ch> wrote:

Hi All,

is there anyone out there who has some experience with the blocking
mechanism of Microsofts mail server? We're running a mail server at our
company which ends up on their blacklist from time to time and we're
wondering if there are some steps we could take in order to prevent this.

Cheers,
Dominique
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