Re: [Exim] receiver_verify_*

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Autor: Philip Hazel
Data:  
Para: David Corbin
CC: Greg Ward, exim-users
Asunto: Re: [Exim] receiver_verify_*
On Thu, 4 Oct 2001, David Corbin wrote:

> > receiver_verify_addresses = !192.168.100.0/24 : !30.40.50.48/28
>
> But *ANY* address will fail one of those two conditions. That's my point
> when I say that exim allows me to say (!A or !B), but I don't think it
> allows (!A and !B)


Consider the address 127.0.0.1. Exim scans the list from left to right.
It does not match 192.168.100.0/24, so the scan passes on. It does not
match !30.40.50.48/28 so the scan passes on. Oops, we hit the end of the
list. The rule in Exim is that if you hit the end of a list after a
negative item, the answer is "yes". So the answer will be "yes,
127.0.0.1 matches this list".

The reason it works like this is so that simple settings like

receiver_unqualified_hosts = !1.2.3.4

have a natural interpretation.

However, this is never going to work for you. The option
receiver_verify_addresses is an *address* list (surprise, surprise), not
a host list. You should really be using receiver_verify_hosts.

> I did RTFM.


You can never RTFM enough. :-)

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.