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.

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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