Wei Da wrote:
> Hello,
> I'm a software programmer and I work for a software corporation. We worked
> on dovecot for a while. We want to add some new functions to dovecot. For
> example, the mail stored on Mail-Server is plaintext, so we want to make it
> encrypted. As the documentation was not too much, and read the source code
> was too difficult for em. Would you give me some advice if I make this
> specialty as a plugin?
> Thank you!
> 

Sounds like you want to write a new storage engine. See the "Cydir"
storage source code for an example. Wiki page:
http://wiki.dovecot.org/MailboxFormat/Cydir

~Seth

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