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

[Nigel Metheringham]

On Fri, 2001-12-07 at 03:57, Peter C. Norton wrote:

> Sure, but the beauty is that there's almost no way that a broken MTA can
> bounce in such a way as to not know where the message went. 

I just *love* this boundless optimism.
Never underestimate the ability of MTA writers and postmasters (ie those
configuring their MTA) to do something *really* obscure to screw you. 
[VERP-ed header addresses, folks?  :-) ]

>  So you can afford to handle a
> lot more bounces, and implement an ezmlm-like probe when it gets critical,
> all in the certianty that you're (a) not bouncing messages to the list
> admins that they have to read and (b) if you miss any messages over a long
> time you can reset your counter and let the user know what they've missed.

Yeah - some of the MLMs are encoding the message number (ie a sequential
number per mailing list message) into the VERP.  That opens up
interesting possibilities.

[Hmm... are there systems that are broken by long sender addresses?]

	Nigel.