RE: some qmail message not being delivered to a certain smtp server. header questions

[John W. Lemons III]

I think I've figured out their problem...  They are using FTGate to retrieve
the mail from their ISP who places all their mail in a multi-drop mailbox.
Then the "smartpop" stuff in FTGate pulls the info from the ISPs drop box
and distributes it to the various local mail boxes, but can't distribute
some of the messages because the ISP is not modifying the message headers to
append the "expected" X-Recipient header derived from the RECV TO:
information from the envelope.  Is it just me, or does this sound
non-standard?  Any RFCs on this?