Localhost Certificate has expired

My OSX Mountain Lion Mac Mini Server is CONSTANTLY sending me e-mails that my certificate for "localhost" has expired. I mean I'll get 5 in a row from the thing. In my Server setting there is NO SUCH CERTIFICATE listed, only "server.local" which does not expire for 11 more months. I'm SICK of getting stupid e-mails about a certificate I cannot find and cannot do anything about. What can I do about it?

In case anyone is interested, the solution to this appears to be to go to Applications/Utilities/Keychain Acess and then the broken/expired certificate will appear under SYSTEM and you can delete it there (seems to be created automatically when server is first run before you choose your own specific name and the system doesn't get rid of it; it was set to expire in 2010 for goodness sake and I bought the machine in 2012 and it's a 2012 model!)