Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!mcvax!ukc!etive!glasgow!steve
From: steve@mrc-apu.cam.ac.uk (Steve Platt)
Newsgroups: comp.mail.sendmail,mail.uk-sendmail-workers
Subject: any clairvoyents out there?
Message-ID: <10039.8904200904@kocab.mrc-apu.cam.ac.uk>
Date: 20 Apr 89 09:04:49 GMT
Sender: daemon@cs.glasgow.ac.uk
Lines: 37

Can anyone guess why sendmail (uk, 1.4a) on a SUN (os 3.5)
might botch the following ...

a) mail arrives from outside (JANET); addressed to non-existant user here
b) sendmail tries to reply to the sender
c) IFF the sender has dots in his/her name (eg some.body@somewhere) , the 
address seems to get spaces put around the "@", so that there are now three receipients;-
 1) some.body
 2) @
 3) somewhere
All three are treated as local users and only (2) is valid
(it is an alias for postmaster, thank god!)

here is a snippet:-
----------------------------------------------------------------
|From MAILER-DAEMON Tue Apr 18 15:47:07 1989
Date: Tue, 18 Apr 89 15:46:55 BST
Subject: Returned mail: User unknown
To: a.salway
To: MAILER-DAEMON
To: uk.ac.aberdeen

   ----- Transcript of session follows -----
550 stevejackson@uk.ac.cambridge.mrc-applied-psychology... User unknown
550 uk.ac.aberdeen... User unknown: Invalid argument
550 a.salway... User unknown: Invalid argument

   ----- Unsent message follows -----
Received: from aberdeen by sirius.mrc-apu.cam.ac.uk; Tue, 18 Apr 89 15:46:55 BST
Date: 18 Apr 89 15:41:50 BST
From: a.salway@uk.ac.aberdeen
To: stevejackson@uk.ac.cambridge.mrc-applied-psychology
Message-Id: <18.Apr.89_15-40-50_a.salway@uk.ac.aberdeen>



----- End Forwarded Message -----