At 23:43 -0700 on 07/02/2002, ned(_dot_)freed(_at_)mrochek(_dot_)com wrote
about Re:
Last Call: SMTP Service Extension for Content Negot:
> Keith's operational plan can be done by sending RCPT TO (where he would
send RCAP) and terminating the sequence with RSET. This way the RCPT
TO acts just as the RCAP would act in his model (as I understand it).
Sure, it isn't as clean by any means, and makes the server do a little
extra work, as it doesn't know the RCPT TO's aren't real ones when it
receives them, but as a trade off, it seems OK.
Ah. Using the first round of RCPT TOs as capabilities checks only and sending
the RSET unconditionally is really quite cute. It still has the added
complexity of having multiple commands per recipient, but now it is the same
command repeated, which eliminates a bunch of the edge conditions
and makes the
silly states very silly indeed.
The RSET can be made optional by ONLY sending it if the replies to
the RCPT TO requests return a result that requires multiple copies of
the message.
IOW: If the LCD of all the replies is the BEST version you are
capable of sending (such as getting back some "I support color"
replies mixed with "B+W-only support" replies when you only have a
B+W Fax), then just bypass the RSET and retransmission of the RCPT
TOs and go direct to DATA (and collect your $200).