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