or this http://support.microsoft.com/kb/278339/EN-US/ George Taylor Systems Programmer Regiona Health Inc. _____ From: Spencer Read [mailto:ser@xxxxxxxxxxxxx] Sent: Thursday, July 13, 2006 5:24 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Port number in exchange Does this help? http://support.microsoft.com/default.aspx?scid=kb;en-us;833799 ...Spence _____ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of jithendranath reddy Sent: 13 July 2006 12:21 To: exchangelist@xxxxxxxxxxxxx; [ExchangeList] Subject: [ExchangeList] Port number in exchange Can some body tell me what are the ports between exchange server and outlook will use to send and receive mails . Regards Jithendranath Reddy.