> On Jan 7, 2018, at 2:15 PM, Yuval Levy <post...@sfina.com> wrote:
>
> My understanding of Microsoft's reply is that there is nothing wrong
> with the server / IP / reputation. Their reply point to a content
> filter at work.
There are multiple factors that go into black-box decisions by spam
detection engines. Though your IP address may ok, the IP block it is
in may be less so.
I agree that silent discard is rather drastic, and ideally false-positive
messages other than malware should end up in the "Junk" folder for the user
to find as needed.
It seems there's not much you can do. If you have other means to reach
your clients ask them to get a mailbox at a different provider or add
you to their contact list. If they are unwilling to do that, perhaps
they don't especially want to receive your email, in which case, the
anti-spam filter is doing what the user wants... :-(
--
Viktor.
