GPG: Are attachments or headers also encrypted on C-c C-m C-c?

[Marius Hofert]

Hi,

Is a message encrypted with GnuPG (PGP/MIME) via C-c C-m C-c (or signed and 
encrypted with C-c C-m
C-e) fully encrypted in the sense that attachments are also encrypted? 

I would have guessed that only the main part/body of the email (without subject
headers or attachments) are encrypted, but I couldn't find sufficient 
information on this. 

Cheers,

Marius