Really I did not see it. Now I am checking my server with the link you' ve sent me. But the thing is, why I received the following messages from yahoo.com Tissera -----Original Message----- From: Administrator Sent: Wednesday, December 31, 2003 11:03 AM To: Administrator Subject: Notification: Outbound Mail Failure - A protocol error occurred. A mail message was not sent due to a protocol error. 553 Mail from 202.124.167.186 not allowed - VS99-IP1 deferred - see help.yahoo.com/help/us/mail/defer/defer-02.html (#5.7.1) The message that caused this notification was: To: <sandulol@xxxxxxxxx> From: <Administrator@xxxxxxxxxxx> Subject: RE: 11.02 -----Original Message----- From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] Sent: Friday, January 02, 2004 12:42 AM To: [ExchangeList] Subject: [exchangelist] RE: Third party relaying http://www.MSExchange.org/ You are worrying about nothing. Did you read this paragraph: This host accepted our relay test message, but does not appear to have returned it. It may yet return the relay test message to us, in which case the server is open to relay. It may never return the relay test message, which means it is probably not open to relay. If this is the case, you should urge the developers of your mail software package to fix their software to correctly adhere to best current practices, i.e. don't accept mail you don't intend to deliver. See RFC 2505 <http://www.rfc-editor.org/rfc/rfc2505.txt> , among others. Did you check the link I sent? http://www.dnsstuff.com/tools/ip4r.ch?ip=202.124.167.186 You are fine. John Tolmachoff Engineer/Consultant/Owner eServices For You ------------------------------------------------------ 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 ------------------------------------------------------