Blocking send and receive external messages

[mmgomess]

Hello friends.

I need a specific user send and receive messages only from my domain. He can not receive or send external messages.

Can anyone help me?

Sorry my bad english.

Thanks.

[phoenix]

I need a specific user send and receive messages only from my domain. He can not receive or send external messages.

Search the wiki (or the forums) for the word 'restrict'.