return-path

[Ian]

I'm having a problem with Worldnet. I have a user here who uses a
blackberry and has his worldnet email forwarded to the blackberry.
Recently, he complained that non-delivery notices for email originated
in Worldnet were only going to the blackberry. After some digging, I
see that when Worldnet forwarding is turned on, Worldnet is setting
the return-path as the forwarding address. So the non-delivery notices
are sent there.

Is this an appropriate use of the return-path? My guess is that
Worldnet is doing this to take some of the load of non-delivery
notices off of their servers and direct it elsewhere. Is there any way
around this?

Thanks in advance,

Ian

[Kjetil Torgrim Homme]

[Ian]:

>
> After some digging, I see that when Worldnet forwarding is turned
> on, Worldnet is setting the return-path as the forwarding
> address. So the non-delivery notices are sent there.

I don't understand this explanation, so let me just say how it should
work:

when forwarding a message, the return-path shall _not_ be changed,
only the recipient address ("rcpt to") changes. changing the sender
address ("mail from") will very easily lead to mail loops.
--
Kjetil T.