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To avoid backscatter on mailman instances use the following parameters

subscribe_policy = 2
respond_to_post_requests = 0
reject_these_nonmember = []
generic_nonmember_action = 3
forward_auto_discards = 1

Also make sure the owner addresses have trust rules for mail coming from mail-man, since all (bounce) spam gets forwarded to the address. If you for example use a free account at BigCorp, you end up getting your mailman instance blacklisted in RBL rules due to backscatter SPAM and 'spammy' forwards.

Last modified 19 months ago Last modified on Oct 12, 2020, 7:16:28 PM
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