Hi All, I'm hoping someone can help me out here or point me in the right direction. We've been testing perdition for a while now to do ldap based lookups of a users mail server and proxy their pop/imap connections through a single service alias. Just as we were about to announce it and roll it our to all our users I started getting reports of Thunderbird both Mac and Windows versions not showing the folders for certain users. I can't find anything for these users that's any different to the ones that work and these users will sometimes start working, once by deleting the .mailboxlist file and I've had one user who said their thunderbird stopped allowing them to subscribe to new folders, they just don't show up. Connecting directly to the mail server allows the users to see all of their mailboxes and subscribe to them but so does using a different client via perdition. Snooping on the connection and turning on Thunderbird's debugging I see the following where thunderbird seems to be sending pipes and percents instead of forward slashes and asterisks. 36108288[17bf8150]: 276c400:imap.st-andrews.ac.uk:A:SendData: 46 list "" "~|mail|test3/%" 36108288[17bf8150]: ReadNextLine [stream=17bf8a58 nb=22 needmore=0] 36108288[17bf8150]: 276c400:imap.st-andrews.ac.uk:A:CreateNewLineFromSocket: 46 OK LIST completed 36108288[17bf8150]: 276c400:imap.st-andrews.ac.uk:A:SendData: 47 list "" "~|mail|test3/%/%" The only difference I can see in responses is that going to the server directly, the initial OK header also contains the capabilities but I have other imap servers which don't show capabilities in the initial header that I've never seen thunderbird exhibit this behaviour with. In thunderbird Account Settings -> Server Settings -> Advanced The Imap server directory is ~/mail and "server supports folders that contain sub-folders and messages" is unchecked in general. Personally, I've never touched those settings and have never had this problem with may mail account, but I've setup one of the failing accounts in my mail client and seen the problem both with these variables set / unset. Any thoughts? Cheers, Duncan