Add additional authentication methods for email server configuration
I'm unable to configure email alerts right now because of how our certificate and DNS are configured, which results in name mismatches--if I use the correct name that resolves to an internal address, I get a certificate name mismatch. If I use the name on the certificate, I end up connecting to the wrong IP address. Thus, the only way I can configure alerts is to disable the secure connection, which I don't want to do. It would be nice to have some other options here so I could work around the certificate name problem.