http://www.msexchange.org -------------------------------------------------------I am assuming that the rdns entry is @ the public DNS server? -----Original Message----- From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Bruce J. Rose Sent: Friday, September 08, 2006 9:28 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Mail Sending problem to some domains, Urgent help needed http://www.msexchange.org -------------------------------------------------------Check your RDNS entry for you Mail server it has to match the Helo response. Bruce -----Original Message----- From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Jensen, Douglas Sent: Friday, September 08, 2006 10:16 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Mail Sending problem to some domains, Urgent help needed http://www.msexchange.org -------------------------------------------------------The first thing I would try would be to use Telnet to connect to the servers you are having problems sending to using port 25 (SMTP) and try to manually send a email to the person. The following Microsoft web page tells how to use telnet to test SMTP communications. Try to telnet to the server you are having problems sending email to. http://support.microsoft.com/?kbid=153119 Telnet to Port 25 to Test SMTP Communication Douglas Jensen Douglas.Jensen@xxxxxxxxxxxxx Voice (952) 402-9821 Fax (952) 402-9815 Network Administrator Scott Carver Dakota CAP Agency, Inc. 712 Canterbury Road Shakopee, MN 55379 www.capagency.org -----Original Message----- From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Supreet Singh Sent: Friday, September 08, 2006 8:58 AM To: msexchange Subject: [ExchangeList] Mail Sending problem to some domains, Urgent help needed http://www.msexchange.org -------------------------------------------------------Hi All, I am facing a problem since last week , i am unable to send mail to some domains. I have checked my ip , it is not listed in any of blocking lists. Following are the error logs which i recieve very frequently. You do not have permission to send to this recipient. For assistance, contact your system administrator. <servername #5.7.1 smtp;550 5.7.1 <recipient@xxxxxxx>... Relaying denied. IP name possibly forged [my server's ip 11.11.11.11]> Could not deliver the message in the time limit specified. Please retry or contact your administrator. <servername #4.4.7> There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <servername#5.5.0 smtp;550-Verification failed for <senderemailid@myservername>> Regards Supreet Singh __________________________________________________________ Yahoo! India Answers: Share what you know. 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