Here is the situation. I work for Company A our email addresses are xxxx@CompA.com , We have a partner company called company B Thier email is xxxx@CompB.com , We have a secure VPN between us, what we want to do is allow users on the Comp B network to send email to users on our network without having to address them to @CompA , but rather address them to @CompB. Then we need our users reply to look as though it is coming from CompB. I think setting up custom recipients is the best way to handle this, but I am not sire how to do it.