Michael Sims wrote: > Your log files are showing the envelope sender, which is not always > the same as the address in the From header. Read receipts (or > disposition notifications or whatever you want to call them) are sent > using a null (<>) envelope sender for the same reason that delivery > status notifications are sent with a null sender, to prevent mail > delivery loops.
They may be sent with a null envelope if it's generated by the server (you *can* specifically request such a notification), but I checked on a few of the receipts I have in the support inbox I read here, and none of them use the null envelope- they ALL use the recipient's real email address. I can't think of any reason an MUA should use a null envelope, and in fact I've found a case where it causes more problems- users who are running a spam filter on their system that replies to spam! The reply ends up stuck on your server, occupying resources. IMHO, users should NEVER send email with a null envelope from a client system- bounces will never reach them. (Instead, the bounce annoys their postmaster.) -kgd -- "Sendmail administration is not black magic. There are legitimate technical reasons why it requires the sacrificing of a live chicken." - Unknown _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
