On Tue, Sep 19, 2006 at 10:40:56AM +0100, oliver howe wrote:
> 
> 
> I have the following check for valid users in my configure file in the 
> Routers section
> 
> check_valid_user:
>  driver = redirect
>  domains = mydomain.co.uk
>  require_files = !${perl {get_user_dir}{$local_part}{$domain}}
>  condition = ${if exists {perl {get_user_dir}{$local_part}{$domain}} {yes} 
> fail}
>  data = :blackhole:

Conventional wisdom would be to arrange for your router to only accept valid
users in the first place, then add "require verify = recipient" in your "rcpt"
ACL.  Then you don't need to handle all those bounce messages.

> If I try and accept all such messages and bounce back a "unknown local-part
> in domain" error message then the rest of my network will grind to a halt.

Ouch!  Yes, that's why most people don't do that.

-- 
Dave Evans
Power Internet

PGP key: http://powernet.co.uk/~davide/pgpkey

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