[Cialug] Sendmail spam rejection

[Aaron Porter]

On 10/24/06, Daniel A. Ramaley <daniel.ramaley at drake.edu> wrote:
> So far Google has not been quite as helpful as i would have liked
> (probably because i'm not familiar enough with sendmail to search the
> correct terms), but i've found 2 possibilities. I don't know whether
> they are plausible, though. One would be to set up a virtusertable hash
> file with a list of valid recipients (all 20 000 of them), but i think
> that is mostly used to rewrite addresses. I don't want to rewrite
> addresses, i just want to have a list of valid ones and deny the rest:
>     user1 at example.com    user1 at example.com
>     user2 at example.com    user2 at example.com
>     ...
>     @example.com         error:"550 We do not accept spam"
>
> Would that work? If not, the other idea i've seen would be to set up
> sendmail's ldap_routing feature, but instead of using real LDAP, use a
> hash table. Unfortunately, i've not yet found understandable
> instructions on how to use the ldap_routing with a hash file.

Might fit better into the access table, but it should work.

user at example.edu    ACCEPT
@example.edu            error:"500 foo"