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- Path: sparky!uunet!wupost!cs.utexas.edu!swrinde!sdd.hp.com!network.ucsd.edu!mvb.saic.com!tgv.com!info-multinet
- From: NED@SIGURD.INNOSOFT.COM (Ned Freed)
- Newsgroups: vmsnet.networks.tcp-ip.multinet
- Subject: Re: POP3 server with PMDF personal aliases.
- Message-ID: <42E0065409SEP92235306@TGV.COM>
- Date: 9 Sep 92 23:53:06 GMT
- Organization: The INFO-MULTINET Community
- Lines: 27
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- X-RFC822-From: Ned Freed <NED@SIGURD.INNOSOFT.COM>
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-
- > Bummer. I'm still not sure why, since POP3 uses SMTP and we're using the
- > PMDF SMTP Server, it doesn't work. I assume that the PMDF SMTP Server
- > doesn't invoke PMDF_MAILSHR to send messages?
-
- All PMDF sees is an incoming SMTP connection. This connection is completely
- separate from the POP connection you're using to read mail. PMDF has no
- way of knowing what user (if any) the SMTP connection is associated with.
- TCP/IP provides no facility for determing the remote user, and even if it
- did there's nothing that says the remote user corresponds in any way to
- the local user and particular personal alias file.
-
- It would be reasonably trivial to do personal alias expansion on incoming
- SMTP mail if we just knew whose personal aliases to use. Getting the headers
- right is somewhat harder -- the SMTP protocol operates under the assumption
- that the headers have already been constructed and no longer have any
- association with the envelope addresses.
-
- What is really needed is a posting protocol where the various envelope
- addresses can be specified along with which header they are associated
- with. This would make it possible for PMDF to construct the proper header
- by expanding (or not expanding) personal aliases. Unfortunately this is
- not possible in plain SMTP.
-
- None of this has anything to do with PMDF_MAILSHR. Personal alias expansion
- works fine from Multinet MM, and MM doesn't use PMDF_MAILSHR.
-
- Ned
-