In SmarterMail we have mailing list that is close; that is, only members can post to it. Then there is a separate mailbox that we would like to automatically forward to the mailing list. At first, I thought we could just make that mailing box a member of the mailing list. However, if we do that, then there is a feedback loop. A message gets sent to the mailbox, which forwards to the mailing list, but then a copy of that message is sent back to the mailbox (because it's a subscriber of the list), and then that message is again forwarded to the mailing list and so on. There is a loop that keeps sending messages back and forth causing the mailboxes to fill up infinitely.
Our second plan was to remove the mailbox as a subscriber but make it the moderator. This is because a moderator is always allowed to post to the list, even if it's not a subscriber. That works for just sending messages from the mailbox to the mailing list, but it does not work for forwarding messages. If I send a message to the mailbox that is automatically forwarded to the mailing list, I get this response:
"Sorry, you do not have permission to post to the xxx.acme.com mailing list.
I don't know why it won't allows a forwarded message but does allow just a regular message. Any suggestions?
The real goal is to find a way to have messages auto-forwarded from the mailbox to the mailing list without getting the feedback loop. I would be open to any other suggestions. Is there a way to make someone a subscriber to a list but they can't receive list messages, only send them?