Make sure your POP3 client is configured to authenticate with the outgoing mail server. So in Outlook Express go into Tools > Accounts, open the properties for your mail account, click on the Servers tab and make sure you have the checkbox checked to authenticate with the Outgoing Server. Hope this helps Mark Fugatt MCT, MCSE, Microsoft Exchange MVP Pentech Office Solutions Inc Tel: 585 586 3890 Cell: 585 576 4750 Fax: 585 249 0316 MSN IM: mark@xxxxxxxxx www.4mcts.com www.exchangetrainer.com -----Original Message----- From: Hery [mailto:hery@xxxxxxxxxxxxxx] Sent: Friday, October 24, 2003 12:58 AM To: [ExchangeList] Subject: [exchangelist] RE: Relay Problem http://www.MSExchange.org/ Hi Thomas, i trying send an email using outlook express, the mail server is exchage 2003 (just installed). from client, i can't send it out, the reason is unable to relay. the i try using outlook express at email server computer. and the problem is occurs too. but if i send to local user (i mean another user in our lan), it works. just when i trying to send email to another domain, the problem is comes out. i try to find a good article for ex2k3. but not found till now. hery ----- Original Message ----- From: Thomas W Shinder <mailto:tshinder@xxxxxxxxxxxxxxxxxx> To: [ExchangeList] <mailto:exchangelist@xxxxxxxxxxxxx> Sent: Thursday, October 23, 2003 22:31 PM Subject: [exchangelist] RE: Relay Problem http://www.MSExchange.org/ Hi Hery, What host says its unable to relay? From what server do you receive this message? Thanks! Tom Thomas W Shinder www.isaserver.org/shinder <http://www.isaserver.org/shinder> ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp <http://tinyurl.com/1llp> -----Original Message----- From: Hery [mailto:hery@xxxxxxxxxxxxxx] Sent: Thursday, October 23, 2003 1:25 AM To: [ExchangeList] Subject: [exchangelist] Relay Problem http://www.MSExchange.org/ hi all,,....relay problem again i've setup ex2k3 (behind firewall). all is ok untill i try to send email. it said unable to relay. i don't know where to check the relay option in ex2k3. can anyone help me with this problem ? thx. hery ------------------------------------------------------ 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 ------------------------------------------------------