HELP - newbie

[Pavel Sorejs]

I have problem with Users.
I Using qmail with MySQL and trying to send mail. If i send mail then i
don't receive that user doesn't exist but the mail isnt't delivered to his
mailbox. What can be wrong ??
I did everything in LifeWithQMAIL configuration guide and it doesn't work.
If you need some confs pleas tell mi which one you need.
Can someone help me ??