I have recently installed Ubuntu 10.04 (server) and after that using tutorial "Perfect Server [ISPConfig 3]" installed the ispconfig. The installation was a piece of cake (no problems, no errors). In the ISPC3 I have added one "Client" and under this client created about 10 mailboxes. Now I cannot login by Squirrelmail (user unknown or invalid password), neither the mail is not delivered to the server, reply is: "550 550 5.1.1 Reciepient address rejected: User unknown in virtual mailbox table (state 14)" Does the virtual mailbox table needs to be started somehow? Or initialized?