I have non-valid Domain in my ms Windows Server 2008 (KC.com) I installed an exchange server to route emails in my company and to out of company one of my user like (A1@kc.com) wants to forward his gmail and yahoo email to his my exchange server accountlike this : A1@gmail.com --> forward --> A1@kc.com how shall do this?????

Hi, By the way, what do you mean about non-valid domain? Does it mean that the domain can’t send and receive internet messages? If you want to forward gmail or yahoo emails to Exchange account, first you need to ensure that your domain accounts can receive internet messages. Besides, you need to make some setting in gmail or yahoo clients. Here is an article ‘Forwarding mail to another email account automatically’ you can refer to. Hope this helps. Thanks Sophia Xu