Master, difficult, MDaemon mail server user mail configuration file Decoding

The attachment is the user mail configuration file of the MDaemon mail server.
/Files/bookworm/imap.rar

There should be a lot of friends who use MDaemon email servers. I have been using MDaemon for a few years and there is no problem in integrating with the office system, but there is a problem that has always plagued me, I have checked whether MDaemon's old nest has found how many unread (new) emails the user has, mdusercomlib. I have tried all the methods provided by DLL. After reading the MDaemon Forum prompts, I can only use IMAP. MRK.

So I want to write an application service on the server and regularly read and analyze the IMAP of each user. MRK file, get his new mail number, and write it to SQL, but I cannot find his encoding method. I posted a post on csdn and no one can solve it, I hope you can have a decoding expert or someone who knows how to get a new email. Thank you.