North American Network Operators Group
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Re: verizon.net and other email grief

  • From: Michael Loftis
  • Date: Fri Dec 10 15:54:53 2004 

--On Friday, December 10, 2004 15:38 -0500 Paul G <[email protected]> wrote:

----- Original Message -----
From: "Paul Trebilco" <[email protected]>
To: <[email protected]>
Sent: Friday, December 10, 2004 3:30 PM
Subject: Re: verizon.net and other email grief


How so? Are you maybe confusing reject with bounce? If address
verification takes place while the SMTP connection is still up, no
forged adresses get messaged, at least not by the server doing the
rejecting.

oh, so you would be ok with someone joe-jobbing you on their 1 million
messages/day spam run and getting 1 million 'verification' connections to
your mailserver farm?
Far less traffic than the bounces would create at both ends. Yes this doesn't prevent it from happening if the address is real, but that's why I mentioned SPF in my previous email......That helps to verify the sender can send email for a given domain, and if that passes, then you want to see if the sender exists, if both pass then you can go on to other methods. OF course I'd first check blacklists before any of this, but that's my personal preference.