Your IP address is on a blacklist. I have a similar problem with my mailserver at home, but I have to use a smartrelay to send through a non blacklisted ip address. For my example, I could not get off the blacklist as comcast has a group of address's blacklisted. I ended up having to send my outgoing mail through their smtp server in order to get around the problem. Rob Freeman ----- Original Message ----- From: Qusai A. AL Haddad To: [ExchangeList] Sent: Wednesday, August 27, 2003 6:37 AM Subject: [exchangelist] Exchange 2003 Problems http://www.MSExchange.org/ 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 ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: sysadmin@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')