Restricting users to internal email only

[cinatus]

I have several customers that want only certain email addresses to be able to send email in or out. They all use the webmail and I was wondering if anyone else has run into this and what you did to implement it.

thank you

-cinatus

[cinatus]

I am bumping because I REALLY need some help.

[ntwaddel]

You could block all outgoing smtp traffic with iptables.

[cmdln]

Sounds to me like he wants to selectively enable relay access based on individual email addresses.

..... If I understand correctly you want to block most users from sending mail outside of their domain. Just have a list of emails that are allowed to send outside the domain?

[cmdln]

I dont know how to do it in exim but I did find this implementation if my assumption was correct, .... it is postfix though.
http://www.elantech.ru/docs/postfix-...E.html?print=Y