Paddington Chidziva:
> Good day
>
> I am running a mail server with postfix but my clients who uses the SBS 2008
> pop3 connector are having problems when they send a read/delivery request in
> their e-mails. The SBS event viewer says because of invalid headers the pop3
> connector could not download the e-mails.
>
> I checked on web-mail and saw that the e-mails that cannot be downloaded
> have the return path set to mailer daemon. How can I change the return path
> on the e-mails that sent back as a delivery/read notification to the
> original sender.
As required by Internet mail standards (RFC 5321, 2821, 821) delivery
status notifications (success, delay, failure) must be sent with
the null Return-Path address. This is not negotiable.
If you are using software that mis-handles email wuth the null
Return-Path address, then that software does not fully support
Internet email. I suggest replacing or updating it, or not
exposing it to Internet email.
Wietse
