As some one else replied, SMTP Authentication has nothing to do with the OS, it has to do with the e-mail client. AFAIK, Outlook Express 5.x and greater, Outlook 98 and greater, Netscape 6.x (Shudder) and greater all support SMTP Authentication. John T eServices For You -----Original Message----- From: Andrew English [mailto:andrew@xxxxxxxxxxxxxxxxxxxxxx] Sent: Wednesday, October 12, 2005 4:10 AM To: [ExchangeList] Subject: [exchangelist] RE: Issues with SMTP http://www.MSExchange.org/ Thanks for your advice John, however it does not explain what is needed on a Windows 98/XP Home machines to do authentication in a AD environment. Andrew _____ From: John T (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] Sent: Tuesday, October 11, 2005 8:24 PM To: [ExchangeList] Subject: [exchangelist] RE: Issues with SMTP http://www.MSExchange.org/ In this day and age of spam and viruses, this is part of e-mail basics 101: they must authenticate. John T eServices For You -----Original Message----- From: Andrew English [mailto:andrew@xxxxxxxxxxxxxxxxxxxxxx] Sent: Tuesday, October 11, 2005 4:00 PM To: [ExchangeList] Subject: [exchangelist] Issues with SMTP Importance: High http://www.MSExchange.org/ Hi, I am having some issues with SMTP server. I have clients which connect via the LAN to the exchange server using POP3 and SMTP, the reason for this is they insist on using their own notebook computers and out dated Microsoft Office to obtain their email from the company. The issue I am having is with Relay. They can get their email via POP3 however when they send their email out on the local LAN it tells them they aren't able to replay their email through the SMTP server. How do I get around this without opening the relay up?? Thanks Andrew ------------------------------------------------------ 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: johnlist@xxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@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: andrew@xxxxxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@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: johnlist@xxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx