Our domain (eg: xyz.com) has got POP3 and exchange account users. The exchange server is exchange 2003. Recently one of the users exchange account was shifted back to POP3 account and I have removed that user from AD users and computers. I was able to configure his POP3 email account, but when our exchange internal users send emails to him, it bounce back with the below
i then deleted the mailbox also but when i checked in Exchange Systems Manager and mailboxes I can see his mailbox there. How to solve this issue?