incorrect spam setups cause spool messes on forwarders

Suresh Ramasubramanian suresh at
Mon Dec 1 18:53:14 UTC 2003

Neezam Haniff  writes on 12/1/2003 1:46 PM:

> On Mon, 1 Dec 2003, Suresh Ramasubramanian wrote:
>>So this would connect to the MX of and try to verify
>>that whatever at exists.
> 	Out of curiosity, would you know offhand how they do the
> validation?

It is my job to know, I guess ... as other people's jobs here are to 
know which routes are flapping where.

Mail filtering policies at an ISP can have quite unintended consequences 
on mail delivery from other ISPs.  Especially ISPs that have a huge 
number of users with .forwards set to Verizon mailboxes.

srs (postmaster|suresh) // gpg : EDEDEFB9
manager, security and antispam operations

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