Mime Type for Encrypted Attachments

[Patrick Brunschwig]

What would be the correct content type for encrypted attachments if the
mail is sent as inline PGP (i.e. multipart/mixed)?

I have found a number of content types that seem to be in use, so I'm
not sure what would be the "best". I know that e.g. Outlook uses
"application/octet-stream", but I think this is a rather bad default.

What about "application/pgp" or "application/pgp-encrypted", any idea?

-Patrick