Evolution client imports the wrong ssl certificate

Here's what I found in the ubuntu forum:

"Open your web hosting site using https in firefox (I used my https webmail).  //I don't have https
Double-click on the padlock icon in the status bar at the bottom of the window // or a padlock
Click on the security tab, Click view certificate, Click details, Click export.
Save as an X.509 Certificate (first option).
Open Evolution, Edit>Preferences>Certficates, Click Import
Browse to the certificate you just saved, click Open, You're done!"

I have no padlock on my home page, so I'm still stuck...I checked my Wordpress config (wordpress is installed in my doc root) and there's nothing there on ssl that I can associate with this problem :(
I think I need to set up an https site in apache, which I don't need right now but I guess I can set up a bogus one...

Sorry that I've been unavailable to work on this enough to report back, but it's an amazingly complex issue!  I've implemented everything from here: https://help.ubuntu.com/community/OpenSSL and was able to import a certificate, but the one that Evolution looks for is automatically generated.

So I found this: http://www.linux-noob.com/forums/index.php?showtopic=2223 and was able to localize the default settings on the server for automatically generated certificates; I then restarted pop and pop-ssl services.  My Evolution client now reads the correct location and expiration date, so the automatically generated certificate doesn't look as bad as the I'm-in-NY-and-expire-in-10-years certs that I saw before.  However the Evolution client still tells me that the automatically generated cert is bad, and I can't import a certificate to the client to authenticate something that's automatically generated.  There's no setting on the client that allows me to change how it authenticates either :(  

The OS on the clients is also Ubuntu (Debian) Linux.

Since I can import a cert into the Evolution client that is associated with a stable server key (but not one that is automatically generated) I changed the pop3d.cnf file in /etc/courier to disable the auto-generate-ssl-key and copied all files to /home/user/myCA.  I now have an updated mail certificate in Evolution that has the right location and expiration date which is presumably associated with the correct key, but I can't fetch mail :(

The error in the client says just that: error fetching mail.  I got no errors on the server when restarting pop and pop-ssl.

I'm still working with this page: https://help.ubuntu.com/community/OpenSSL
It sure would help to find some errors.

Here's where I am now - either the procedures at the latest url are wrong or there's something in my server config that prevents their correct implementation.

# openssl s_server -key server_key.pem -cert mycert.pem -CAfile server_crt.pem -state -Verify 10
verify depth is 10, must return a certificate
Enter pass phrase for server_key.pem:
Using default temp DH parameters
Using default temp ECDH parameters
error setting private key
22900:error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch:x509_cmp.c:399:

I gave up and installed Dovecot, and am able to download mail with a bad (default) certificate. Until I can create certs that pass the openssl s_client test, the only authentication method is password, and even so, I have inconsistent results with that:
-Ever since I cleared the password from my client while troubleshooting courier pop3 connections, if I'm prompted for a password, the user password I type in is not accepted.
-If I'm not prompted for a password the mail gets downloaded, but how long that will work remains a mystery, since I can't store a password that isn't accepted.  The email user account name in the client matches the Linux account name on the server, so how password authentication over a LAN connection also fails is as mysterious as the SSL certificate signature failure.

I thought that the simplest thing would be to edit the default SSL Certificate check options that postfix displays (OU = Office for Complication of Otherwise Simple Affairs etc) but I can't find the file where these settings are stored - it doesn't appear to be anywhere in /etc and it doesn't make sense for it to be anywhere else.  Is it perhaps in binary form?  Let me know thanks.