Configure IMAP folder separator

I just upgraded to 12.1 and I’m pleased to see support for IMAP folder hierarchies.

Sadly the the folder structure of my main IMAP account is not recognized. It uses ‘:’ as folder separator. I suspect automatic recognition of the folder separator is not working for me. Is there a way to configure the folder separator manually?

It can’t be changed yet in the current release.

A fix has been merged to automatically aquire the appropriate delimiter from the server. It’s currently scheduled for inclusion in the v14 release. See the initial report about this here.