Thread: module must be activated an SMTP proxy.

I would like to know which module must be activated for an SMTP proxy.

We have a multifunction can send emails and there are abuses on the part of users.

We want blocked all emails that do not belong to a domain (* @ toto.com).
So the only shipments to toto.com are allowed.

Is it possible to do and how?Our config:
Multifunction ---> Untangle (bridged) ---> smtp internal firewall ----> ---> WAN

There is no SMTP proxy itself in the rack untangle. However, it seems that you want to allow only e-mail from domain the@toto.com ...
First, I look at the configuration of the multifunction (? - What is it exactly?) To relay only users@toto.com. This is usually fairly simple to do with most mail servers.
Secondly, use a rule of firewall to allow the evacuation only outgoing SMTP mail server IP and a second rule to deny outbound SMTP (and log) to all guests. In this scenario, traffic from the mail server is the rule of firewall first and e-mail will be allowed to pass. All other hosts will be the match the second rule and will be denied the SMTP transport.