On 16/09/2026 09:59, [email protected] wrote:
Hi all,

I don't know whom to ask.

I get reporting errors that my emails to this usergroup are not relayed 
correctly and end up in the quarantine folder of other users. That is due to my 
stricter SPF and DMARC policies that prevent sending in my name.

Not quite. It is because your DMARC is set to quarantine rather than reject. If it was set to reject, the Tomcat mailing list server would step in and rewrite the headers.

Now I see that different user's emails (eg. Amit Pande and Evan Rempel) get relayed as 
"Evan Rempel via users" with [email protected] as sender.

How is this set up? Is this somewhere found in a FAQ?

I'm fairly sure INFRA have covered this in at least one blog article. Here you go.

https://infra.apache.org/blog/dmarc_filtering_on_lists_that.html

I also recall some debate about re-writing for quarantine as well but I don't recall where. Maybe an Infra ticket? Found it:

https://issues.apache.org/jira/browse/INFRA-28349

Mark



Any help and hints appreciated.

Kind regards

Peter
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