On Sat, Oct 22, 2011 at 12:00:34AM +0200, Hadmut Danisch wrote:
On 21.10.2011 20:02, Dennis Guhl wrote:
The SMTP envelope does only exist within the involved MTAs and only as long as the message is not finally delivered.
The intended use is to create a backup from a mailbox through IMAP, which is as close as possible to the original mbox file, thus resembling the FROM lines as well.
I don't think it will be possible. The tool for this would be rsync (wich might be difficult if you only have IMAP access to the machine in question).
The envelope sender address does not drop it's meaning after delivery.
This I never claimed.
It's required for debugging purposes, writing mail filters, create blacklist filters from detected spam, etc.
Disregarding end users mail filters this are all tasks for mailadmins which can tell thier MTA to write a reliable Return-Path: header and which have access to the corresponding maillog.
Dennis