> On Jun 5, 2026, at 2:07 PM, Jim Seymour via Postfix-users
> <[email protected]> wrote:
>
> On Fri, 5 Jun 2026 10:47:33 -0700
> Jim Garrison via Postfix-users <[email protected]> wrote:
>
>> On 6/4/2026 14:18, Charles Sprickman via Postfix-users wrote:
>>> Hi all,
>> [snip]
>>
>>> Received: from [10.88.0.3]
>>> (166.161.185.35.bc.googleusercontent.com [35.185.161.166])
>>
>> It is extremely unlikely that any legitimate email originates at
>> googleusercontent.com.
>
> That is the conclusion I'm reaching.
>
> From my pflogsumm report for yesterday:
>
> message reject detail
> ---------------------
> RCPT
> blocked using zen.spamhaus.org (12)
> 2 googleusercontent.com (< [email protected])
> 2 googleusercontent.com (< <>)
> 1 host.inseratex.ch (< [email protected])
> 1 googleusercontent.com (< [email protected])
> 1 googleusercontent.com (< [email protected])
> 1 googleusercontent.com (< [email protected])
> 1 googleusercontent.com (< [email protected])
> 1 googleusercontent.com (< [email protected])
> 1 riverhaul.com (< [email protected])
> 1 mail3.ablluresistemas.ink (< [email protected])
>
> This pattern has become essentially a daily occurrence.
So outside of the whole "empty from" thing, this is just another
"onmicrosoft.com" situation it seems.
I blocked that some time ago and have seen no ill effects.
Here's some random stats, and it's just so sad how much is dropped right at the
front door:
177831 rejected (88%)
And my ever growing list of garbage TLDs:
Sender address rejected: mail from this TLD not accepted (total: 29041)
*plus*
Sender address rejected: maybe check later? (total: 135561) <- I am being a
dick and give these extra-annoying ones a 4xx
And I think I might have fodder for another question for this list here:
postscreen (total: 1651)
1539 psc_dnsbl_request: connect to private/dnsblog service: Connecti...
<<-- ?? google not at all helpful here - I have no limits in master.cf on
dnsblog procs
100 dnsblog reply timeout 10s for dnsbl.ascams.com
And it looks like I need to get a new pflogsumm, because I want those
postscreen stats! :)
Thanks for the input, much appreaciated.
Charles
>
> I considered listing googleusercontent.com locally, but since SH is
> getting the stuff, anyway ¯\_(ツ)_/¯
>
> Regards,
> Jim
> --
> Note: My mail server employs *very* aggressive anti-spam
> filtering. If you reply to this email and your email is
> rejected, please accept my apologies and let me know via my
> web form at <http://athena.LinxNet.com/contact/scform.php>.
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