Hi, Bob was told right and you have to remove your IP from the Block list server if it is blocked. If not check your SMTP virtual server configurations. In addition, you have to close your Relay for the Internet users (outsiders) if your server listed in the Block list (Spam) server. It will be good to change your current IP with the help of your ISP, if Possible. Lakshmanan K. Network Administrator Aravind Eye Hospital Madurai, Taminadu, India. -----Original Message----- From: Bob Fronk [mailto:bfronk@xxxxxxxxxxxxxxxx] Sent: Monday, March 08, 2004 10:41 PM To: [ExchangeList] Subject: [exchangelist] Re: 550 relaying denied madness http://www.MSExchange.org/ The problem is listed in the error. Your IP is blocked as a open relay. You need to make sure you are not an open relay. http://www.ordb.org/submit/ Then contact the ISPs that are blocking you and have your IP removed from their block. Bob Fronk bfronk@xxxxxxxxxxxxxxxx -----Original Message----- From: Dusty Jones [mailto:dusty@xxxxxxxxxxxxxxxx] Sent: Monday, March 08, 2004 12:25 PM To: [ExchangeList] Subject: [exchangelist] Re: 550 relaying denied madness http://www.MSExchange.org/ The error that is coming back is as follows: Permanent error involving remote host. 550 Dynamic IPs/open relays blocked. Contact <openrelay@xxxxxxxxxxxxxxxxxxx>. We have had this ip addres for about 3 months and have had a mail server on it for 3 days. Any ideas.. ------------------------------------------------------ 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 ------------------------------------------------------ ------------------------------------------------------ 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 ------------------------------------------------------