Kevin Fenzi writes: > I can't force the list to do this. Your domain would need to enable > DMARC and set reject or quarantine Pretty sure it's not "his" domain. I believe GMX is a major internet provider (and email provider) in Germany, which already has an explicit DMARC policy of 'none' on gmx.net, and 'quarantine' on subdomains. I suspect they've thought out their DMARC configuration pretty carefully. Does Fedora participate in the ARC protocol? I didn't see any ARC fields for Fedora in the headers. Both of the sites he's reported DSNs from (outlook and Google) do understand ARC, so that might help (especially at Google, which is invoking From alignment even though GMX publishes 'p=none'). No promises, of course, as both those domains are well-known for thinking they know better than everyone else. Steve @ GNU Mailman FWIW _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue