Per olof Ljungmark:
> Hi,
>
> We have a problem with one receiving domain, we see a bounce as in the
> subject.
>
> I think this is an Exchange server that forwards the message to another
> Exchange box that refuses to receive it.
This crappy behavuior is permitted by RFCs: a forwarder either
converts 8-bit content to 7-bit (like Postfix does) or it
returns the message as undeliverable.
You can force Postfix to do the 8-bit to 7-bit conversion with
smtp_discard_ehlo_keyword_address_maps or smtp_discard_ehlo_keywords
(discard the 8BITMIME announcement).
Wietse
