IMAP Folder Mail Separator

[Alex]

Hi,

I have a fedora21 install with dovecot-2.2.18, and when creating a new
subfolder with thunderbird, the actual folder name is
"Folder1^Folder2" with a carat as a separator, instead of creating
Folder2 in the Folder1 directory.

Is this a thunderbird problem? I don't recall having this problem
prior to upgrading to fedora21, so thought maybe it's a dovecot
problem.

Maybe the separator character is customizable?

Thanks,
Alex