reencrypt emails with another user id

[Jan Kowalsky]

Hi all,

maybe a little bit o.t. but I'm looking for the possibility to reencrypt
messages inside an imap folder.

My situation: I have some emails encrypted with an uid stored on imap
and I wan't to reencrypt them with another UID.

(The reason: It's encrypted with a uid which resides only on a card -
and I wan't to save the mails for secure access in the future if the
card get lost).

Anybody has an Idea? I looked around and found this tool so far:
http://chrislee.dhs.org/projects/imapcrypt.html which is only for
encrypting - not for decrypting and reencrypting.

Thanks in advance and kind regards
Jan