Ian,... Again, AFAIU, IETF nor the RFCs do consider the MIME types as way to determine what the sender/creator intends the recipient to do with it.
So any assumptions you made about files attached to emails, etc. do IMHO simply not fit. And actually that's the way we already have; the clients give the user a choice of e.g. programs what to do. Just look at IETF's handling of ecmascript and javascript types, where text/* was deprecated. And PHP is of the same kind here. Cheers, Chris.
smime.p7s
Description: S/MIME cryptographic signature
