On 9/10/25 04:24, M.Ede via Mailman-users wrote:
Thanks, I will not do any DMARC mitigations for my list.
When I switch to anonymous list, my Headers looks like this:
[QUOTE]
Authentication-Results: mailserv.er;
dkim=none;
dmarc=pass (policy=none) header.from=t-online.de;
spf=pass (mailserv.er: domain of [email protected]
designates 194.25.134.17 as permitted sender)
[email protected]
...
Ist there any possibility to change smtp.from or to remove it when using
anonymous lists?
This is a bug. It was not recognized that the Authentication-Results:
header could expose the sender. This should be fixed. The following
patch will remove the header. Hopefully it will not have unwanted side
effects. What in your MTA is providing this? I don't think opendkim or
openarc include an smtp.from in Authentication-Results:
```
--- a/src/mailman/handlers/cleanse.py
+++ b/src/mailman/handlers/cleanse.py
@@ -91,6 +91,8 @@ class Cleanse:
# And something sets these
del msg['x-mailfrom']
del msg['x-envelope-from']
+ # In some cases Authentication-Results: can expose the sender.
+ del msg['authentication-results']
# And now remove all but the keepers.
self.remove_nonkeepers(msg)
i18ndesc = str(uheader(mlist, mlist.description, 'From'))
```
(I habe found a solution to configure rspamd to whitelist my mailinglist, but I
think there should be a better solution, right?)
That's an rspamd issue. If you can find out exactly what causes rspamd
to hit SPOOFED_UNAUTH, there may be something we can do in Mailman.
It seems from the above Authentication-Results: that you are not DKIM
signing your list's outgoing mail with the list domain? You should do
that in your outgoing MTA. That may avoid the SPOOFED_UNAUTH.
--
Mark Sapiro <[email protected]> The highway is for gamblers,
San Francisco Bay Area, California better use your sense - B. Dylan
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