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Blocking Sender Spoofing in Data Part From:

From: Mohamed Abuabakkar Siddiqu (siddiqugmail.com)
Date: Mon Feb 07 2005 - 04:03:24 CST

Hi,

Need your suggestion in blocking Spoofing in From: in Data field

This is the senario

Assume that mydomain name is mydomain.com.

The command sequence spammers use to spoof is

telnet 1.2.3.4 smtp
Mail from: <siddiqugmail.com>
rcpt to: <siddiqumydomain.com>
data
From: <your-bossmydomain.com>

You are fired..
.

MUA will take FROM: as from address and display as the mail has
originated from mydomain itself

Any suggestions to block such type of spam mails ...?

Thanks in advance...
Sidddiqu.T