About POP3 service and virtualuser

[X-admin]

Hi all!
I have a new problem about POP3 service.
After create a new email account in Cpanel, i have check successfully on webmail, sending& receiving are very nice
But when i use Outlook Express to check mail, there is a problem. Because SMTP server and POP server are installed in only one server, i enter the IP address of server for SMTP&POP3 server parameter in Outlook, insert username and password and done......
Click send/receive in Outlook, it notice
Account: '203.162.0.214', Server: '203.162.0.214', Protocol: POP3, Server Response: '-ERR Authentication failed.', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC92
and i can't login to my email
My SMTP is Postfix, POP3=Dovecot, I have config all as the same as guide tutorial. telnet at port 25 and 110 are good, these services are online.Also checked " Mail dir" in ISPConfig Setting

Additionaly, each account mail is a real user of OS. What the way we can use as virtual user? Real user is not good in security aspect!

Thanks for your help!

[till]

ISPConfig 2 uses linux system users only, if you want to use virtual users, you will have to use ispconfig 3.

To your authentication error, take a look in the mail log file.

[X-admin]

ISPConfig 2 uses linux system users only, if you want to use virtual users, you will have to use ispconfig 3.

To your authentication error, take a look in the mail log file.
Thank till
But how do i connect to POP3 server!i don't know why i'm incorrect

[falko]

Any errors in your mail log (in the /var/log/ directory)?

[X-admin]

Any errors in your mail log (in the /var/log/ directory)?
Yes, some errors:
dovecot: pop3-login: Login: user=<admin>, method=PLAIN, rip=::ffff:127.0.0.1, lip=::ffff:127.0.0.1, secured
dovecot: POP3(admin): Disconnected: Logged out top=2/4497, retr=0/0, del=0/2, size=4636
dovecot: pop3-login: Disconnected: user=<admin@webserver3.vdc.com.vn>, method=PLAIN, rip=::ffff:203.162.130.241, lip=::ffff:203.162.0.214

I use webmail very nice but Outlook is not. Tell me what can i do to prevent from mail spam with Spamassasin