If you're using Eudora 6.1 or earlier, you may receive an error message that says:
SSL Negotiation Failed: Certificate Error: Cert Chain not trusted. Try adding this certificate to your certificate database for SSL to succeed.
The error message looks like this:
This happens because older versions of Eudora do not include the correct "SSL root certificates" to encrypt your e-mail messages.
One way to solve this problem is to simply upgrade to the latest version of Eudora, available from www.eudora.com.
If you do not wish to upgrade, you can use the instructions below to add the necessary SSL certificate to your current version.
Click Tools, then Options from the menu bar.
Click Sending Mail in the category list, then click the Last SSL Info button.
Click Certificate Information Manager.
Make sure that the mail.tigertech.net certificate (located under server certificates) is highlighted, then click Add To Trusted.
The certificate will be added and appear under the User Trusted Certificates
Click Done to close the Certificate Information Manager window, then OK to close the Eudora SSL Connection Information Manager and OK to close the Options window.
Eudora should now be fully configured. Try sending yourself a test message.