How to detect inline PGP in mails! Best practice?

Sascha Kiefer sk at
Fri Jun 17 11:34:27 CEST 2005

Hi list,

i'm writing on a programm which verifies and decrypts messages as they 
It it is fully S/MIME (using M$ Crypto API) and PGP/MIME (GnuPG) compatible.
The hardest problem i face is to detect inline PGP parts and handling 
them correctly:

* if the charset != us-ascii inside textmails is not always bad since 
most MTA's keep the
  original charset; so handling the data as binary is often the best 
* what about detached signatures of attachments?
* sending a PGP/MIME to this mailing list makes it even worse
  (see Topic: "GnuPG Clearsign vs. PGP/MIME Signing" for more details)
* ...

Do you have some hints?


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