Kristian Førde wrote:
> Hi,
>
> I'm trying to reduce the number of valid adresses for several domains hosted on
> one server. Firstname.Lastname@domain should work, username@domain should not
> work for people sending mail to it (but exim should be able to deliver the
> expanded aliases).
You want to enable delivery to aliases only?
> The host has about 1000 unix users and 5 domains, that is 5000 valid adresses +
> the official adresses (aliases). Spam is a problem...
>
> Exim 3.3.x is in production, but will upgrade to 4.x soon (or now, if someone
> know how to do this in 4.0).
Mostly everything is easier with exim4 ;)
With exim4.12 this would be a three-liner in the RCPT ACL.
deny message = We don't accept mails to real usernames
domains = +local_domains
local_parts = passwd;$local_part
This will reject anything to realuser@localdomains (you still should
accept mails to postmaster and some other standard accounts).
I think something like this is possible with exim3 too (could be a
little bit hacky), but I encourage everyone to switch to exim4.
ciao
