Have you search the MS KB for that error message? Have you checked the items in that KB? 2 possible problems: One is a misconfiguration on the client. One is possible that the ISP of the user is blocking outbound port 25, in which case the user on that ISP will have to use the outgoing SMTP server of the ISP. Some ISPs are doing this in an effort to stop/reduce viruses and spam. John Tolmachoff Engineer/Consultant/Owner eServices For You -----Original Message----- From: Lettah LG. Dladla [mailto:Lgdladla@xxxxxxxxx] Sent: Tuesday, March 30, 2004 12:30 AM To: [ExchangeList] Subject: [exchangelist] RE: Help on pop3 settings[Scanned] http://www.MSExchange.org/ Hi John this is the message I'm getting : Unable to logon to the server using Secure Password Authentication. Account: 'email.psu.edu', Server: 'email.psu.edu', Protocol: POP3, Server Response: '-ERR Unknown command: "auth".', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC18 I have their server a incoming and mine as outgoing , is this correct? -----Original Message----- From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] Sent: Tuesday, March 30, 2004 9:16 AM To: [ExchangeList] Subject: [exchangelist] RE: Help on pop3 settings[Scanned] http://www.MSExchange.org/ What kind of error is she getting? Most likely, SMTP server requires Authentication is not checked on the client. John Tolmachoff Engineer/Consultant/Owner eServices For You -----Original Message----- From: Lettah LG. Dladla [mailto:Lgdladla@xxxxxxxxx] Sent: Monday, March 29, 2004 11:06 PM To: [ExchangeList] Subject: [exchangelist] Help on pop3 settings http://www.MSExchange.org/ Hi Guys I need help on setting up pop3 for external email , I have this user who wants to access her email from an outside company (university). I tried setting up pop3 , she can recieve but can't send. Can you help me with the settings , which one should be my incoming server and my out going server. I think maybe I mixing up the ip addresses . Is this safe? which is the best option to do this? thanks Lettah ------------------------------------------------------ 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 ------------------------------------------------------ ------------------------------------------------------ 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 ------------------------------------------------------