Well you can have a secure in-box yourself, but your e-mail will still be sent to untrusted providers. Another option is to give a certificate to your contact

Well you can have a secure in-box yourself, but your e-mail will still be sent to untrusted providers. Another option is to give a certificate to your contact and send all conversations encrypted. edit: oops, I did not notice bhousel's post (posting the same in other words)