On Tue, 25 Feb 2025, Bill Cole wrote:

On 2025-02-25 at 09:31:44 UTC-0500 (Tue, 25 Feb 2025 09:31:44 -0500)
[snip..]
The problem with googlegroups is that google seems to let people create
groups and add people to them.  Really, that google seems to choose to
allow spamming with gmail in general.

Yes, Google is a net bad actor regarding spam. I personally treat them as a default spam source, so that mail from any part of their open sewer must have some affirmatively positive indicators to even be seen by SA. Obviously, I don't believe that such a policy fits SA or even the mail systems I work with that are not my own.

However, I would strongly advise that anyone needing to reliably receive Google Groups mail look at local protective practices for specific groups based on the List-ID, X-Google-Group-Id, or Mailing-list headers. Even if our RuleQA doesn't prove out the value of an exclusion of them from the MAILING_LIST_MULTI rule, there will probably be some other work towards catching that spam. This is something like the fourth time people have brought this problem up here, so it is not going away until SA starts marking Google Groups mail as spam or it stops being predominantly spam.

In several of the Google headers added for their groups there are domain names of spamvertizers. (EG: X-BeenThere, X-Spam-Checked-In-Group, List-Archive, etc).

Is there a straightforward way to harvest those domain names and then feed them to an RBL for filtering? (short of writing my own custom module).

I've got my own local RBL that I use for spamvertizing DNS names but the default SA processing doesn't seem to 'see' those imbedded names.

Dave

--
Dave Funk                               University of Iowa
<dbfunk (at) engineering.uiowa.edu>     College of Engineering
319/335-5751   FAX: 319/384-0549        1256 Seamans Center, 103 S Capitol St.
Sys_admin/Postmaster/cell_admin         Iowa City, IA 52242-1527
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