On Tuesday 20 May 2003 12.19, Carlos E. R. wrote:
Mmm... technical question: our posts get to list with our "from". If there is an error, "we" get posted back. Now, Is that the correct behavior by the "receiver side", or should it bounce to the envelope? Or should it detect it is a mailing list and do something else?
rfc1123, section 5.3.3 f there is a delivery failure after acceptance of a message, the receiver-SMTP MUST formulate and mail a notification message. This notification MUST be sent using a null ("<>") reverse path in the envelope; see Section 3.6 of RFC-821. The recipient of this notification SHOULD be the address from the envelope return path (or the Return-Path: line). There is a "Precedence" header that some people claim should stop bounce messages from being sent if it's set to "bulk" or "list", but I haven't been able to find an rfc for it. In fact, rfc2076 explicitly discourages it.