[Mailman-Developers] Huge lists

Nigel Metheringham Nigel.Metheringham@VData.co.uk
Wed, 24 May 2000 15:52:52 +0100

claw@kanga.nu said:
> Actually on the input side it would be 2M/SMTP_MAX_RCPTS where
> SMTP_MAX_RCPTS defaults to 500.  Additionally, Exim (I haven't checked
> Postfix, but I doubt it) does not collapse identical spool entries
> with different RCPT TO lists, so you're still left with the same
> number (checking for identicallity is expensive). 

You pedant :-)

Granted although that raises the other issue... Barry mentioned 
yesterday that he was putting the dropped SMTP_MAX_RCPTS functionality 
back in... but I thought it had deliberately gone on the basis that 
mailman was giving the mail delivery job to the MTA and not trying to 
second guess it.

If we do split the list, then ideally it should be sorted.... at least 
so identical domains go together and maybe more intelligently than 
that.... and we're back to trying to second guess the MTA at its own 

> I would expect them to have configured their MTA to not attempt
> pre-lookups for messages arriving from MailMan.

I guess that we need a per MTA tuning/configuration document.  I pretty 
much have that in the exim mailman howto (always willing to take 
contributions/comments on that BTW - especially if they suggest 
solutions rather than just raising criticisms).  Have we got that data 
for the other MTAs?   Of course we could have comparisons of the 
suitabilities of different MTAs if people enjoy a decent flamefest.

[ - Opinions expressed are personal and may not be shared by VData - ]
[ Nigel Metheringham                  Nigel.Metheringham@VData.co.uk ]
[ Phone: +44 1423 850000                         Fax +44 1423 858866 ]