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
