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)

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