[Mailman-Users] Has anyone actually implemented Postfix address verification for their sites?

Christopher X. Candreva chris at westnet.com
Sun May 7 19:49:03 CEST 2006

On Sun, 7 May 2006, Brad Knowles wrote:

> 	I'm curious to know -- Postfix has this address verification 
> feature, which is kind of like greylisting.  Basically, before a 
> message from a given envelope sender will be accepted, the system has 
> to get a confirmation that the registered MXes for that envelope 
> sender domain will at least appear to accept messages for that sender.

This does not scale. Please do not turn this on.

If everyone did this, it would mean when someone forges my domain into a 
spam run, my servers will be hammered by all these requests to verify this 
bogus mail.

Chris Candreva  -- chris at westnet.com -- (914) 967-7816
WestNet Internet Services of Westchester

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