[Mailman-Developers] Re: way to minimize IO load with MTA supported VERP

[Dan Mick]

> Okay, I agree, your way is better.  Let's make it as simple as possible:
> 
> 	HELO shrek.org
> 	250 smtp.aol.com Hello shrek.org [123.45.6.7], glad to see you.
> 	MAIL FROM:news@shrek.org
> 	250 news@shrek.org... Sender ok
> 	RCPT TO:ogre@aol.com
> 	250 ogre@aol.com... Recipient ok
> 	VERP FROM:ogre-aol.com-1007679391-1f04c30dabd-news@shrek.org
> 	250 ogre-aol.com-1007679391-1f04c30dabd-news@shrek.org... Sender ok
> 	RCPT TO:witch@aol.com
> 	250 witch@aol.com... Recipient ok
> 	VERP FROM:witch-aol.com-1007679391-297c0dd13a3-news@shrek.org
> 	250 witch-aol.com-1007679391-297c0dd13a3-news@shrek.org... Sender ok
> 	DATA

The way it's already implemented in Postfix is:

MAIL FROM: sender@sender.dom XVERP

everything else is as normal, but the envelopes get VERPed.