CDR: Re: Anonymous Remailers cpunk

"Trei, Peter" wrote:

I would like to suggest that a remailer could eliminate nearly all it's problems by only sending out encrypted mails - that is, if after removing the encryption that was applied using it's own private key, it finds that the result is plaintext, it simply drops the message.

I like that idea. so much that I might start a remailer with these properties, in order to test it out. single question left: what is a reliable way to see whether or not a text is plain or cipher?