POP3 Error or Mail Server Error

[silverstone]

Hi..
I cannot send or receive email at POP3. I test validation for this email and I found error message as below :

250 2.0.0 Resetting
VRFY mynames
252 2.1.5 Cannot VRFY user, but will take message for <mynames@sls-db6p1>
RSET
250 2.0.0 Resetting
EXPN mynames
500 5.3.3 Unrecognized command
RSET
250 2.0.0 Resetting
MAIL FROM:<[email protected]>
250 2.1.0 [email protected]....Sender OK
RCPT TO:<[email protected]>
550 5.7.1 Unable to relay for [email protected]RSET
250 2.0.0 Resetting
QUIT
221 2.0.0 sls-db6p1 Service closing transmission channel

Tickets submited.

Thanks,