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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