Re: Using MongoDB as a custom message store via plugin

I wouldn't be surprised if it would actually be easier to write an IMAP server than to write a Dovecot plugin, especially if you have a good IMAP library to work with. You can do it in the language of your choice, and not need to worry about Dovecot's internals. The server you make can be pretty bare-bones, if you plan to run Dovecot in front of it as an "IMAPC" proxy to add more features. Dovecot lets you turn off a lot of IMAP features in the IMAPC configuration; if Dovecot will be your only client, you don't need to implement the ones that you turn off. (But note that IMAPC works a lot better if you implement the UIDPLUS IMAP extension.)

Andy