[Courier-imap] changing messages "behind" courier imap via ftp

[Fejes J. <fe...@jo...>]

Hi,

I uploaded a few thousand messages in an email client of mine from a 
local archive to a Courier-IMAP mailbox. This email client seems to be 
broken because it prepended a "From " line to every message (no colon, 
no content, just this string). Now this stupid line breaks not just 
other email clients but the one that it created it too...

This is not my server, but I do have FTP access to it. So I figured 
that I can mount it and run a script to remove those lines. The email 
address in question is the same that I'm sending this message from, my 
IMAP folder is named Archive, and the messages are here: 
"[ftproot]/mail/joco.name/fejes/.Archive/cur", and a sample message file 
name is 
"1325972890.M623329P527044V0000000000000904I0000000000708B06_0.varga.lanten.hu,S=3905:2,S". 
The only reason I know it's Courier-IMAP is because of files named like 
that, and it's also in maildir format because of a file named like that, 
I don't know other technical details, but I can ask my ISP if it's 
needed.

So here's the question of the day: if I change messages via FTP 
directly, do I break anything? There's a file named courierimapuiddb 
that contains file name and UID mappings, I won't change either, so this 
seems alright. I don't know what to do with the 
courierimapkeywords/:list file or the maildirsize file, or possibly 
other places where Courier stores its state.

Thank you very much for your help,
Jozsef