Validating Email addresses
paul.lemmons at tmcaz.com
Mon May 11 21:03:17 IST 2009
-------- Original Message --------
Subject: Validating Email addresses
From: Julian Field <MailScanner at ecs.soton.ac.uk>
To: MailScanner discussion <mailscanner at lists.mailscanner.info>
Date: 05/06/2009 01:57 AM
> On 05/05/2009 18:55, Paul Lemmons wrote:
>> We are getting a great deal of Spam bypassing both Postini and Mail
>> Scanner due to a discrepancy between how these two products define an
>> email address and the way Exchange does. The two scanning products
>> recognize emails with a pipe character "|" at the beginning of the
>> address as both valid and part of the email address. I believe this is
>> in line with the email standards. Exchange, othe the other hand simply
>> ignores the character. So a message sent to me at mydom.com and
>> |me at mydom.com are seen as two different addresses by the scanning
>> systems and as a single address by Exchange.
> Set "Reject Messages" to point to a ruleset, and have a ruleset that
> looks roughly like this:
> FromOrTo: /^\|/ yes
> FromOrTo: default no
> and MailScanner will reject messages coming from or going to an address
> starting with a pipe character.
> Simple as that.
> Remember to "service MailScanner reload" after changing the ruleset and
> MailScanner.conf file.
I have tried this and now I am getting a new message in my log....
MailScanner: Cannot match against destination IP address when
resolving configuration option "rejectmessage"
# cat reject-messages.conf
FromOrTo: /^\|/ yes
FromOrTo: default no
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