* Move to maildir local folders sometimes fail. See [https://bugzilla.mozilla.org/show_bug.cgi?id=859011 bug 859011], [https://bugzilla.mozilla.org/show_bug.cgi?id=1215722 bug 1215722].
* Rename of IMAP folders is in progress. See [https://bugzilla.mozilla.org/show_bug.cgi?id=857436 bug 857436]
* Crash [@ OOM | small ] during generating MSF file. See {{Bug|1333342}}
== Methods that may result in Process crash ==
Please don't use CopyService for any copy operations in the source code if you are using maildir. As of now,
we haven't addressed this bit and copying using CopyService results in process crash.