[IMail Forum] user unknow

[Janno Hordijk]

My mail is bounced back when sending mail to my imail server. When I send from my imail server to another server it's received without any problem. When I sent mail from my imail server to my imail server everything is okay too.   So the only problem that I have is that the rest of the world cannot send mail to an user in my imail server concluding that my pop3 is rejecting mail when it is not send by a smtp server on my imail server.   I tried a telnet hostname 26 (25 is in use for virusscanning) and a vfy {username} and it recognizes my users.   What can I check further?