Re: [Exim] Mailing lists with a twist

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Συντάκτης: Nigel Metheringham
Ημερομηνία:  
Προς: Florian Weimer
Υ/ο: exim-users
Αντικείμενο: Re: [Exim] Mailing lists with a twist
[Not sure if I really understand your requirements]

On Mon, 2002-04-08 at 17:03, Florian Weimer wrote:
> The mailing list has got the following unusual characteristics:
>
> 1. For each subscriber, a rather complicated calculation is necessary
>    to decide whether he wants to receive the message or not.


Isn't this best done in the MLM and passed to exim as a list of
recipients? Then again theoretically you could do an expansion within
an DB enabled exim if you have the appropriate information....

> 2. Each message sent to a subscriber needs to carry a unique envelope
>    and header From address.


The envelope could be handled using VERP - see the VERP section in the
online documentation. I guess you could use the headers_rewrite
option, or a header_remove header_add pair on a transport to do the
From: mangling - best make sure nothing else ever goes near that
transport :-)


> The solution should be scalable to thousands of subscribers (but
> better tens of thousands).


Shouldn't be a big problem other than your bandwidth requirements will
be higher...

    Nigel.


--
[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]