RE: POP3 client using another user's IMS SMTP address

[McCrary Earl Contr 411 FLTS/TSF]

Thanks Chris,  that's what I guessed the answer was.  I did receive your
message, although the address was slightly different from what your message
said it would be.  I will take a couple of NO-DOZE and read those RFCs.

-----Original Message-----
From: Scharff, Chris [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 29, 2001 7:46 AM
To: Exchange Discussions
Subject: RE: POP3 client using another user's IMS SMTP address


Because that's how SMTP mail works? [EMAIL PROTECTED] just
sent you a mail message in a completely RFC compliant manner.. and I'm
fairly sure he wasn't logged onto your network or using a POP3 client at the
time.

RFC821 & 822 explain it all in amazing detail.

*************************************************************
  Chris Scharff    [EMAIL PROTECTED]    www.swinc.com
  Simpler-Webb, Inc.      Austin, TX         +1-512-322-0071
************************************************************* 

> -----Original Message-----
> From: McCrary Earl Contr 411 FLTS/TSF 
> [mailto:[EMAIL PROTECTED]] 
> Sent: Wednesday, August 29, 2001 9:36 AM
> To: Exchange Discussions
> Subject: RE: POP3 client using another user's IMS SMTP address
> 
> 
> If that's the case, then why would an ISP ever use Exchange 
> as their Email
> server?
> 
> Earl McCrary,  MCSE, CCNA
> F-22 Combined Test Force
> CSC, Federal Sector - Defense Group
> 661.277.7993
> 
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, August 29, 2001 5:05 AM
> To: Exchange Discussions
> Subject: RE: POP3 client using another user's IMS SMTP address
> 
> 
> I don't believe you can.
> 
> -Mich�le
> Immigration site:  <http://LadySun1969.tripod.com>
> Our new 2001 Miata:  <http://members.cardomain.com/bpituley>
> Tiggercam:  <http://www.tiggercam.co.uk>
> ---------------------------------------------------------
> WARNING: The consumption of alcohol may make you think you 
> are whispering
> when you are not. 
> ---------------------------------------------------------
> 
> 
> -----Original Message-----
> From: McCrary Earl Contr 411 FLTS/TSF
> [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 28, 2001 6:53 PM
> To: Exchange Discussions
> Subject: POP3 client using another user's IMS SMTP address
> 
> 
> How can I prevent a POP3 email client from using another 
> user's SMTP address
> in the From: field of an email message?
> 
> Here's the situation:   When configuring a POP3 email client 
> on a networked
> connected workstation using a valid network user account;  I 
> can configure
> the POP3 client to use any users' Exchange container name as 
> the username
> (blank password) and once configured, send an email to the 
> Exchange Server
> IMS connector for delivery via SMTP.  The email arrives at 
> the destination
> with the "forged" user's address in the FROM field.
> 
> Is there some setting on the IMS connector to prevent this?  
> 
> Earl McCrary,  MCSE, CCNA
> F-22 Combined Test Force
> CSC, Federal Sector - Defense Group
> 661.277.7993

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