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[Kazim Koybasi <address@concealed>]

Hi all,

We are upgrading our sympa server to the latest 6.2.64 version and we want to implement sender spoofing prevention also in sympa since some spammers misuse our private lists addresses with sender spoofing. We protect our private lists server with sender match protection and for increased protection we want to implement  SPF, DKIM and DMARC in our lists server. We enabled DKIM in our test SYMPA server and it works but we do not know how it will behave with DMARC records like p=reject and relaxed alignment.  I have read the documentation but can not be sure whether it automatically rejects dmarc failed messages (SPF, DKIM failure) or we need to implement opendmarc configuration for rejection of messages like that. Thank you for reading.

https://sympa-community.github.io/manual/customize/dmarc-protection.html

https://sympa-community.github.io/manual/customize/dkim-arc.html

Regards.