Cyrus APIs ?

[Thomas Cataldo]

Hi,

We are building webmail & groupware software using cyrus for the mail
storage part. I'm wondering if any programming interface existed to
extend cyrus parts ?

Interesting things for us would be :
  - extending sieve (for exemple to implement "in my organisation" /
"out of my organisation" vacation messages)
  - IMAP protocol extensions (most needed thing would be to "idle" on
every folders, not just inbox)
  - custom authentification mechanism (for single sign-on purpose,
because kerberos doesn't fit everywhere)