On Thu, Jan 8, 2026 at 8:13 PM John Fawcett via mailop <[email protected]>
wrote:

>
> On 09/01/2026 00:34, Jaroslaw Rafa via mailop wrote:
> > Dnia  8.01.2026 o godz. 16:21:56 Robert Giles pisze:
> >> On 1/8/2026 at 15:45, Jaroslaw Rafa via mailop wrote:
> >>> So if you mention rejection rate above... for me it was 100% for long
> time.
> >>> And this while no spam was ever sent from this domain.
> >> I think it's probably more to do with IP reputation;  OVH is a
> >> terrible company with a non-existent abuse desk, so it's more likely
> >> folks are simply scoring / dropping large swaths of OVH IP space.
> > Well, the only thing that we know for sure is that YOU are blocking
> > connections from my IP address; and it is definitely a bad practice to
> send
> > someone a direct email while that someone cannot reply to you directly.
> >
> > As for Google, I have explained multiple times that I have proven that
> it is
> > related to domain name. It is in the list archives.
>
> Hi Jaroslaw
>
> I am pretty sure that the rejects/messages delivered in spam folder is a
> decision taken at domain name level and it seems to fit with Google
> documentation. It fits with my limited experience and testing of sending
> email to Google accounts.
>
> However, that does not exclude the possibility that  ip reputation of
> the sending hosts could be one of various factors taken into
> consideraton when making those domain level decisions.
>

I'm not sure the distinction you're making, but spam decisions are made
holistically on a per-message-transaction basis based on
a wide variety of individual factors combined in various rules.  The worse
the domain reputation, the fewer other signals
used and the higher bar for non-spam signals.

It's probably true that in the modern ip6 eco-system that domain reputation
is more prominent in rules than ip reputation
(or iprange really when it comes to ip6)... but in the absence of enough
information at the domain/ip level, it probably
falls back to tld or larger network ranges... That implies a certain level
of organization to the rules which at least didn't
used to exist, but periodic attempts to organize them more... the
difference between daily spam fighting and longer term
efforts at improvement and tackling new spammer tactics etc.

There's also the related but parallel anti-phishing stuff, of course,
commercial spam or even bulk email isn't the only threat
to users.

Brandon
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