For this to work, either your mail client is not enforcing TLS be used, is not validating the certificates presented to it, or trusts Stanford's MITM certificat

For this to work, either your mail client is not enforcing TLS be used, is not validating the certificates presented to it, or trusts Stanford's MITM certificate. Perhaps you should try port 465 with forced SSL. Stripping TLS is unforgivable. Shame on them.