SSL SMTP doesn't support self-signed certificates

Our SMTP server has a self-signed certificate. This causes Fisheye to fail to deliver mail because it tries SSL and then fails with:

problem sending email
javax.mail.MessagingException - Can't send command to SMTP host
javax.net.ssl.SSLHandshakeException - sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
sun.security.validator.ValidatorException - PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
sun.security.provider.certpath.SunCertPathBuilderException - unable to find valid certification path to requested target

Fisheye either needs to support this environment, or fall back to using non-SSL connections when SSL fails.