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There are a couple of reasons why Mailman doesn't send a post to all regular members with delivery enabled. The post can be from a member whose "Receive your own posts to the list?" option is No (not metoo checked in the admin membership list), or a member whose "Avoid duplicate copies of messages?" option is Yes (nodupes checked in the admin membership list) is directly addressed in To:, Cc:, Resent-To: or Resent-Cc: of the incoming post. Unless you have evidence that these are not the reasons, this is expected behavior. Also note that if a member is not sent a copy because her address is in Cc: of the incoming post, that address will be removed from Cc: in the post sent to list members, so you can't tell by looking at a post received from the list if a member with nodupes set was addressed in Cc: of the incoming message. ** Changed in: mailman Status: New => Incomplete -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1756009 Title: emails are not delivered to all recipients To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1756009/+subscriptions