Sign in problem

[samolet]

Sorry if my English is not good enough. but I'll try to explain the problem.
when I sign in the program shows me for a moment the mailbox and then drop out back to the sign in page.
Did somebody the same problem?

 setup was done according the instructions to postfix program...

[SKaero]

Is there anything in your error log?

[samolet]

Which log file should I look in? (in Linux)

[SKaero]

In your [RC root]/logs there should be file titled errors