Hi all I ve been looking here for solution to my problem whith exchange 2000 (running as a part of SBS2000) but there was only a near questions without asnwers, so I'll try My roblem Is that I cannot receive mails on mailboxes of my domain. Comunication with other world runs fine because I can send mails out but whe I replu on it there is atomatic answer from my server: This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: 'email' <valachovic@xxxxxxxxxxx> Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 9): 'IP' Unable to relay for 'email' could you somebody please help me with that? Peter Valachovic <valachovic@xxxxxxxxxxx>