On Sat, 2011-11-12 at 12:58 +0530, Rajeev Sharma wrote:

I am using vpopmail,qmail along with courier-imap 4.0 i want to migrate from courier to dovecot but i have 100 shared folder under /home/vpopmail/domains/domain.com/Malidir and user shared them on the basis of rights assign.

I am very much clear how to migrate from courier to dovecot but i am unable how to migrate shared folder and assign rights.

I don't think there is any existing documentation about this. I've also not used Courier shared folders myself much. I think the ACL files' contents are compatible, although Dovecot names them differently. IIRC Courier used some kind of symlinked maildir files for shared folders to provide per-user flags? Migrating those to Dovecot would be a bit tricky, especially because Dovecot currently supports only per-user \Seen flags (maybe Courier does too? I'm not sure) and Dovecot stores the per-user \Seen flags only in per-user index files.

Anyway, I don't really have time to look into details of this, so you'll just need to figure out the specifics yourself (or alternatively pay me to do that via my company).