RE: how to block SMTP Commands without ISA Ser

  • From: <oevans@xxxxxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Wed, 3 Dec 2003 16:13:22 -0500

Again this is one solution to a problem.  Did not say everyone will like
it.  The bottom line
is just configure the server not to relay and your fine.  Normally, if
people want to spam
You with e-mails normally there's little you can do about it.  You just
have to
Buy third party solutions to help curb the issues.

-----Original Message-----
From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] 
Sent: Wednesday, December 03, 2003 4:01 PM
To: [ExchangeList]
Subject: [exchangelist] RE: how to block SMTP Commands without ISA Ser

> Look into a firewall solution.  Cisco pix uses a feature called fixup 
> protocol.
> This prevents other protocols to have a session with your server using

> another protocol Such as telnet and at the same time only allows SMTP 
> coming from the outside in.

Extremely bad advice. The Cisco SMTP fixup protocol breaks SMTP

John Tolmachoff
eServices For You

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