RE: is it possible to add a custom special use mailbox

Currently I am using this to try and catch everything in Sent.

mailbox Sent { special_use = \Sent auto = create } mailbox "Sent Items" { special_use = \Sent auto = no } mailbox "Sent Messages" { special_use = \Sent auto = no }

I would like to have something

mailbox Test { special_use = \Test auto = create } mailbox "Test Items" { special_use = \Test auto = no } mailbox "testing" { special_use = \Test auto = no }

Is this page[1] out dated? Because I am getting errors having this imap_capability set.

special_use: Space-separated list of SPECIAL-USE flags to use for the mailbox. There are no validity checks, so you could specify anything you want in here, but it's not a good idea to use other than the standard ones specified in the RFC.

NOTE: Due to a bug in Dovecot v2.2.30+ if special-use flags are used, SPECIAL-USE needs to be added to post-login CAPABILITY response as RFC 6154 mandates. You can do this with imap_capability = +SPECIAL-USE

[1] https://wiki.dovecot.org/MailboxSettings