"Requested action not taken: mailbox unavailable"

Gu3rr1lla

Registered
Sep 6, 2010
1
0
51
I cant receive any emails and i get this error message when trying to send email:

ERROR:
Message not sent. Server replied:
Requested action not taken: mailbox unavailable
550 Verification failed for <[email protected]>
No Such User Here
Sender verify failed
Im using squirrel mail. Any ideas?