Hi If i change my password to include the danish letter , then i can successful logon towebmail,outlookanywhere. But not pop3 it comes whit the following error: -ERR Protocol error. 17 The server is running exchange 2007 SP1 Rollup 3, on windows 2003 SP2 Regards Sren Ravn

Hi, We need more information for further troubleshooting. Please check event log and post the related error information here. Please post the related error information in pop3 log from Exchange Server and client. First please enable POP3 logging in Exchange Server. 1. Please open the following file in Notepad: C:\Program Files\Microsoft\Exchange Server\ClientAccess\PopImap\ Microsoft.Exchange.Pop3.exe.config. 2. Change the following line in the <appSettings> section from:<addkey="ProtocolLog" value="false" /> to: <addkey="ProtocolLog" value="true" /> 3. Save and then close the Microsoft.Exchange.Pop3.exe.config file. Log file can be found under C:\Program Files\Microsoft\Exchange Server\Logging\POP3 If you are using Outlook Express, then please also enable logging there. 1. Start Outlook Express. 2. On the Tools menu, click Options. 3. On the Maintenance tab, under Troubleshooting, click to select the Mail check box. 4. Click Apply, and then click OK. Pop3.log file can be found under: C:\ Documents and Settings\Username\Local Settings\Application Data\Identities\User id\Microsoft\Outlook Express Besides, please try to run secpol.msc to check whether any local password policy has been set. After that, please run RSOP.msc to check whether any domain password policy has been set. Below article explain more on pop3.log,you can refer to it to analyze the log: How to Enable and Interpret the Pop3.log File http://support.microsoft.com/kb/155515/en-us Hope it helps. Xiu

Hi Xiu Thanks for your reply Here is the log file from Exchange 2008-11-21T08:25:40.820Z,,00000000006D225B,0,333.331.332.308:110,333.333.333.333:49616,+,,2008-11-21T08:25:40.820Z,,00000000006D225B,1,333.331.332.308:110,333.333.333.333:49616,>,+OK Microsoft Exchange Server 2007 POP3 service ready,2008-11-21T08:25:40.820Z,,00000000006D225B,2,333.331.332.308:110,333.333.333.333:49616,<,USER mail@domain.com,2008-11-21T08:25:40.820Z,,00000000006D225B,3,333.331.332.308:110,333.333.333.333:49616,>,+OK,2008-11-21T08:25:40.835Z,,00000000006D225B,4,333.331.332.308:110,333.333.333.333:49616,<,PASS *****,2008-11-21T08:25:40.835Z,,00000000006D225B,5,333.331.332.308:110,333.333.333.333:49616,>,-ERR Protocol error. 17,2008-11-21T08:25:40.835Z,,00000000006D225B,6,333.331.332.308:110,333.333.333.333:49616,-,,Local And from windows mail Windows Mail 6.0.6001.18000 (longhorn_rtm.080118-1840)POP3 Log started at 11/21/2008 09:55:42POP3: 09:55:42 [rx] +OK Microsoft Exchange Server 2007 POP3 service readyPOP3: 09:55:42 [tx] USER mail.domain.comPOP3: 09:55:42 [rx] +OKPOP3: 09:55:42 [tx] PASS ********POP3: 09:55:42 [rx] -ERR Protocol error. 17 The strange ting is that if i change my password to Password99, then i can login to pop3,outlookanywhere and webmail. if i change it to Passwrd99 then i can log in to outlookanywhere and webmail with the new password, and pop3 with the old password. If i try to login to outlook with the new password then it reply with -ERR Protocol error. 17. Regards Sren Ravn