EMail server gets blocked by Microsoft

[Dominque Roux <dominique.roux () ungleich ch>]

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