Mail delivery problem on my server

[Madison Kelly]

Hi all,

   I have a very odd, and very worrisome problem on my mail server. Now 
please let me preface that I am a hardware geek more than a softweare 
geek, specially when it comes to Sendmail. Also, the server is up and 
running so switching to Postfix isn't really a viable option (though I 
will for the next server).

   Anyway, here is my problem... When some people send me (mkelly at 
alteeve dot com) a message they get through while others get an error 
like this: (not this person is an Outlook user)

  -= Error Message =-
Your message did not reach some or all of the intended recipients.

       Subject:

       Sent:     30/10/2003 12:11 PM

The following recipient(s) could not be reached:

       Matthew Kelly on 30/10/2003 12:11 PM

             The message reached the recipient's e-mail system, but 
delivery was refused.  Attempt to resend the message.  If it still 
fails, contact your system administrator.

             <cgexchange.consolidatedgroup.ca #5.2.1>
  -= End Error =-

   Now what is particularly wierd is that when they send it to another 
account of mine on my server (linux at alteeve dot com) the message gets 
through just fine. From the server side (Rh7.3 with the default Sendmail 
plus updates from 'up2date') I have tried first dumping my 
'/var/spool/mail/mkelly' file, no good. Next I even deleted my account 
(via '# userdel mkelly') and then recreated my account, nope.

   The only other thing I have noticed is that, for some reason, some of 
the mail account spool files on the server have the group "mail" set 
where most of the others have both owner AND group set to their 
name/group. Finally, a couple other accounts had been changed to 
permission -rw------- (0600) where most again where -rw-rw---- (0660). I 
tried changing my own 'mkelly' file to owner/group mkelly and setting 
the permissions back to 0660 but the message still bounced.

   Does anyone have -any- idea what could be going on?? This bothers me, 
obviously, because mkelly is my main account and I know I am loosing 
messages. BTW, I have also verified loosing messages from other people 
not using Exchange server...

   Many thanks!!

Madison

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