On Wed, 10 Jun 2020, Scott Mutter via mailop wrote:
This IP address - 191.101.16.96 - is a shared hosting server. Shared
Hosting, if you're not familiar with it, takes a server and hosts many
different websites across different VirtualHosts (with the glorification of
HTTP v1.1 and SNI). And as a result we also have many different domain
names that send out mail from this IP. Can I vouch for all of the accounts
on the server and say that they aren't sending out spam? No, I really
can't.
... so shared hosting isn't appropriate for a mail server.
From my perspective this looks more like Hotmail being
overly aggressive with it's IP blockings.
I agree that is how it looks to you ...
... but only because Hotmail can see the mail/spam sent by other services
on that IP and you cannot.
It is an *IP* block; it *has* to lump mail from all servers on that IP
together.
From my perspective it seems entirely reasonable to treat a shared
hosting server similarly to a residential IP that could
switch next time one of the customers makes a DHCP request ...
If you don't have a fixed IP address with rdns and rwhois listing you as
responsible, you should send your outgoing email via someone who does.
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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