Block Outgoing Port 25

[mcit]

Can someone advise the most efficient way to restrict outgoing traffic on port 25. We run Wingate 6.2 with full NAT, no proxies. Internal mail server [not wingate mail server]

All internal clients send via the local mail server so I need to allow the mail server [not on the wingate machine] to send email, but no one else.

In future, I would like to allow multiple mail servers to be used, but no open access.

Any help appreciated.

[adrien]

you can set a policy in Extended Networking

You'd basically need to leave port 25 outbound open in your port security settings, in the "Everyone" setting for Extended Networking, you'd need to make it not grant access to destination port 25 for TCP,

then add another recipient for that mailserver to allow it to connect out on port 25.