Certificate problems with outlook

[tyliong]

Hi,

I followed the Virtual Users And Domains With Postfix, Courier And MySQL (CentOS 5.1) howto and it worked.
Now I am having this nagging certificate problem with outlook. the first time i use outlook to recieve mail i keep getting this Internet Security Warning.

"The Server you are connected to is using a security certificate that cannot be verified. The target principal name is incorrect"
when i click on view certificate it has the following credentials
Issued to:localhost
Issued by:localhost
Issuer:
E = postmaster@example.com
CN = localhost
OU = Automatically-generated POP3 SSL key
O = Courier Mail Server
L = New York
S = NY
C = US

Subject:
E = postmaster@example.com
CN = localhost
OU = Automatically-generated POP3 SSL key
O = Courier Mail Server
L = New York
S = NY
C = US


When i click yes to the option "Do you want to continue using this server ?" everything is alright, i can send and receive mail from my server. but this warning will come back every time i restart outlook. How do i get rid of this error?

[topdog]

To get rid of the error you need a certificate that is issued by a well know CA whose root certificate outlook recognizes. But of course you will have to purchase it.

[tyliong]

There's a problem though i had already changed postmaster@example.com to my domain name with the correct mail address. I initially used postmaster@example.com just to test if it worked now i don't know how to remove this old cert.