On 08 Apr 2021, at 07:31, Benny Pedersen <m...@junc.eu> wrote: > On 2021-04-08 14:16, Matus UHLAR - fantomas wrote: >> in addition to this, you can whitelist outlook's IP ranges at postscreen >> level, as they "likely" aren't what postscreen is supposed to stop - bots. > > there is bots at microsoft, there servers try port 465, and 587 randomly, no > mta would do this
I can think of at least one seemingly very obvious reason why a company that deals in a lot of email like Microsoft or Google would be occasionally scanning servers 587 and 465 ports. Premature blacklisting of servers that allow open submission. -- Professor falls into a hole (Raiders of the Lost Ark)