special_use folders still created

[Marc Roos]

dovecot-2.2.36-3.el7.x86_64

The below configuration seems to work for Thunderbird and emclient, when 
moving a message to Junk. Emclient uses "Junk E-mail" and Thunderbird 
uses "Junk". On the server is only the file .Junk created as expected. 

When I move a message to Archive in Thunderbird. On the server the files 
.Archives and .Archives.2018 are created (Thunderbird creates a 
subfolder in Archives) 

How is this possible? On the server there is already an .Archive folder 
so it should create .Archive.2018 not?


imap_capability = +SPECIAL-USE


  # drafts folders merging
  mailbox Drafts {
    special_use = \Drafts
    auto = create
  }

  # archive folders merging
  mailbox Archive {
    special_use = \Archive
    auto = create
  }
  mailbox Archives {
    special_use = \Archive
    auto = no
  }

  # spam folders merging
  mailbox Junk {
    special_use = \Junk
    auto = create
  }
  mailbox Spam {
    special_use = \Junk
    auto = no
  }
  mailbox "Junk E-mail" {
    special_use = \Junk
    auto = no
  }