All IMAP can be used with CAMAS as far it can be reach using TCP/IP and it following the IMAP RFCs.

For now, CAMAS doesn't support yet IMAPs or IMAP-SSL. There is plans to support such options.
But if you need right not SSL support for IMAP connection, you can use stunnel to tunnelize your IMAP connections to the real server.

If you have Courier-IMAP and when loading or reading a mail, the whole CAMAS/Caudium dies with similar output in debug log :

Index 1884 is out of string range 0 - 1883.
etc/modules/CAMAS.pmod/parser.pmod:100: parseimap(" 4 FETCH (INTERNALDATE
 \"30-May-2001 17:40:15 +0200\" ENVELOPE (\"Sat, 28 Apr 2001 17:54:51 EDT\"
 \""+[1790],0,2,({0,""," 4 FETCH  (INTERNALDATE \"30-May-2001 17:40:15 +0200\"
 ENVELOPE (\"Sat, 28 Apr 2001 17:54:51 E"+[1689]}))
etc/modules/CAMAS.pmod/imapclient.pmod:479: got_data(0,"L NIL
 \"<64.d7e00fa.281c962b@aol.com>\") UID 103 FLAGS () RFC822.SIZE 2361)
 \r\ncamas0022 OK FETCH completed.\r\n")
/usr/local/pike/7.0.317/lib/modules/Stdio.pmod/module.pmod:308: __stdio_read_callback()

This crash is caused by Courier-IMAP itself.
Please upgrade your Courier-IMAP to 1.3.8 or newer because it seems it sends incorrects headers or data thru IMAP

Depending if your IMAP server is dedicated or not (if you don't have any local users on your server using Pine or Mutt).
If it is dedicated, then we recommend using INBOX as path, otherwise you can use ~/mail/ or ~/Mail/.

For Courier-IMAP you have to use IMBOX. (with the trailed dot at the end).
Don't forget also to change the option "Hide mailboxes starting with" to another thing that '.'. Courier-IMAP doesn't like mailboxes starting with a dot. You should also change the folder name for preferences folders to a name without a starting dot.

Yes ! This feature is used by some of our developpers in CAMAS 1.2/1.3 branch. Please wait for 1.2 release to get some more informations about this feature.

There is an expert option in CAMAS to allow you to work with some old Courier-IMAP. Please add the prestate /(expert)/ to Caudium Configuration Interface and check in CAMAS Main module for "Incoming Mail" configuration variable "IMAP server is not RFC-compliant", change it to Yes.