mailman: Reject most mails from nonmembers to reduce moderation workload

All lists expect arch-mirrors-announce and aur-requests[1] require the user to be a member before they can post. Moderating mails from nonmembers are a lot of work and most of the mails are spam, so let's just reject them. Mails to arch-mirrors-announce and aur-requests from nonmembers will still be checked manually, as you aren't required to be subscribed[1].

[1] https://wiki.archlinux.org/index.php?title=General_guidelines&oldid=750602#Reply_to_the_mailing_list

I love how this is a yolo draft

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• 48672858 - yolo

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• ee77e4e5 - yolo

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• 2a3f3ac7 - yolo

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• 8d5d3612 - yolo

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resolved all threads

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• 8d5d3612...51c14dda - 28 commits from branch archlinux:master
• c351a129 - mailman: Reject most mails from nonmembers to reduce moderation workload

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marked this merge request as ready

changed title from Draft: yolo to mailman: Reject most mails from nonmembers to reduce moderation workload

changed the description

mentioned in commit 37b0e24d

merged