Well, try it - If you "telnet smtp.myduc.com 25" then the connection happens, but no response is ever received. After a short while, the connection is dropped. According to the SMTP protocol spec, the SMTP server connected to is required to output an SMTP header...a 220 record. Connect to a known working SMTP server...for example "telnet maila.microsoft.com 25" and what you get is: 220 IGR-IMC-01.redmond.corp.microsoft.com <Inbound SMTP Virtual Server> Thu, 29 Dec 2005 06:06:19 -0800 I am NOT an ISA person, but this implies to me that the ISA server is listening on port 25, but is not forwarding port 25. So...I don't think your publishing rule is correct. M -----Original Message----- From: Pankaj Mittal [mailto:me@xxxxxxxxxxxxxxxx] Sent: Thursday, December 29, 2005 7:56 AM To: [ExchangeList] Subject: [exchangelist] RE: SMTP not working http://www.MSExchange.org/ Michael, Can u elaborate a bit more.. Thx ----- Original Message ----- From: "Michael B. Smith" <michael@xxxxxxxxxx> To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx> Sent: Thursday, December 29, 2005 7:27 PM Subject: [exchangelist] RE: SMTP not working http://www.MSExchange.org/ I don't think your SMTP publishing rule is correct. If you "telnet smtp.myduc.com 25", the SMTP header is never displayed. -----Original Message----- From: Pankaj Mittal [mailto:me@xxxxxxxxxxxxxxxx] Sent: Thursday, December 29, 2005 1:47 AM To: [ExchangeList] Subject: [exchangelist] SMTP not working http://www.MSExchange.org/ Folks, Just installed new Exchange2K3 with sp2 and ISA 2004 with sp1 on 2 seperate DC's. The MX record and all other things are all ok. The mail server publishing rule is working ok on ISA. I can receive some mails but some cant. Also the mails i dont receive is not bouncing back to the sender as well. OS is windows 2003 fully patched. Domain name is MYDUC.COM. any one with any ideas what should i start looking for. TIA Pankaj ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: Me@xxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx