Dear All I am facing a problem that I cannot send to any of the out side hostname I can received from outside and I can send also locally.. When I send to outside I am getting this problem Your message To: Subject: Sent: Wed, 27 Aug 2003 14:33:10 +0300 did not reach the following recipient(s): External Mail on Wed, 27 Aug 2003 14:33:46 +0300 There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <mail.domain.com #5.5.0 smtp;591 your host [IP Address] is blacklisted by relays.osirusoft.com. No mail will be accepted> Regards Qusai