>Oh look, a Verizon mail server.
>
>Verizon (which uses the bizmailsrvcs.net domain name) runs some very 
>bad filtering on their inbound mail. One thing they do is to test 
>MAIL FROM parameters for legitimacy by seeing if they can get through 
>the RCPT phase of trying to mail to them. The effect of this is that 
>if you are using something that would reject mail from the Verizon 
>test machines, you can't mail anyone using a Verizon mail server.

How exactly do they do this? Unless the Verizon machines are on an RBL 
that I use, I don't think I'd be rejecting them. Plus using bogus domains 
seemed to get past the block.

I know when I get to the bottom of this, and find that once again it 
isn't really my fault, I'm going to get some grief. So I'd like to fully 
understand what the situation is so I can go into the "meeting" I'm going 
to get called into with enough ammo to get myself cleanly off the hook.

I'd crank up the logging on my SIMS server to see more info so I can tell 
what Verizon is doing back to me, but for some reason it wasn't taking my 
setting change earlier (no matter what I set it to, it would only log at 
the Problems level... I'm guessing a reboot will fix it, but the door to 
the room its in is behind a large pile of computers so I couldn't get to 
it today.)

-chris
<http://www.mythtech.net>


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