On 09/01/2026 21:03, Brandon Long via mailop wrote:
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
Hi Brandon
I am not sure it makes sense to talk about "the worse the domain
reputation" for domains that actually have never sent a single spam,
have never had any complaints raised by recipients and meet all the
requirements (DKIM, SPF, DMARC etc), but nevertheless have email blocked
or sent to spam folder because they are not big senders for which
statistics are calculated. Such domains have 0% spam whereas Google is
accepting email from senders that have up to 0.3% spam providing they
send enough of it.
But my point was simply to say that behind the blocking we don't know
what the rules are. I believed, maybe incorrectly, that the blocking was
effective at domain level as Jaroslaw was saying. However I don't feel
able to say with certainty that ip reputation has no place in the
underlying algorithm that leads to blocking. I may soon find out because
I'm moving away from OVH.
John
_______________________________________________
mailop mailing list
[email protected]
https://list.mailop.org/listinfo/mailop
