1604736 - Folders disappear in thunderbird when a exotic characters are in the list of IMAP folders

Status: UNCONFIRMED

(MailNews Core :: Networking: IMAP, defect)

Description

[arthur.lutz]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0

Actual results:

Inbox briefly appears, then disappears. Subfolders aren't displayed. msf and other folders containing local copies of emails are removed.

Expected results:

If the IMAP server is sending incorrect information, display a warning to as to warn the administators of that server

Comment 1

[arthur.lutz]

This happened following the upgrade from stretch to buster of the cyrus imap server. The person who did the upgrade says this might be related to https://www.cyrusimap.org/imap/concepts/features/namespaces.html#personal-namespace

One way to fix this, was to remove admin rights to the user impacted (me) which had for consequence to limit the list of folder to my own legitimate folders.

Comment 2

[arthur.lutz]

Attachment: Screenshot from 2019-12-13 17-14-11.png

Comment 3

[Magnus Melin [:mkmelin]]

Which exotic characters? ^?

Comment 4

[arthur.lutz]

Apparently it is related to a mix of "^" and "." perceived as separators. Could this be the problem ?

Comment 5

[arthur.lutz]

The person in charge of the migration of the IMAP server tells me there might be hints on this problem in the following documentation : https://cyrusimap.org/imap/download/upgrade.html#copy-config-files-and-update

Comment 6

[Wayne Mery (:wsmwk)]

duplicate?

Comment 7

[gene smith]

(In reply to Wayne Mery (:wsmwk) from comment #6)

duplicate?

I've seen that "box/null" char but only during tests with multi-byte UTF-8 chars while debugging development code not just with normal folder names with 7-bit us-ascii chars.
I am running with a cyrus imap server test account and don't' see a problem with or without the new UTF8=ACCEPT feature that cyrus supports.
If the reporter still see the problem, we need a lot more info (IMAP logs, etc) to resolve this but, right off, it doesn't seem like a dup.
FWIW, cyrus uses dot as the default hierarchy separator while it seems most others use forward-slash.