I've installed and re-installed Zimbra 7 and have found the certificate page a little flaky. I don't have a fix for that. I scoured the forums here, the wiki, and the search engines for the right combinations of files, but in frustration stepped away from the problem for a while.

I was finally successful on yet another from-scratch install. My notes are available here, but the long and short of it is this:

  1. On the GoDaddy site, choose the bundle for Apache.
  2. Download the gd-class2-root.crt file.
  3. The bundle has the Certificate File <yourdomain.com>.crt.
  4. The gd-class2-root.crt file is the Root CA File.
  5. The bundle has the Intermediate CA File gd_bundle.crt.

This combination of files worked for me.