namespace configuration error

[Jeff Ross]

I've got a few errors I'm trying to track down, probably all related...

Aug 15 14:03:14 xyzzy dovecot: imap-login: Login: user=<jeff>,
method=PLAIN, rip=100.8.22.62, lip=132.238.254.34, mpid=4803, TLS,
session=<fLvfl85WntFkCBY+>
Aug 15 14:03:14 xyzzy dovecot: imap(jeff): Error: namespace configuration
error: Duplicate namespace prefix: ""
Aug 15 14:03:14 xyzzy dovecot: imap(jeff): namespace configuration error:
Duplicate namespace prefix: "" in=0 out=357
Aug 15 14:03:15 xyzzy dovecot: imap-login: Login: user=<jeff>,
method=PLAIN, rip=100.8.22.62, lip=132.238.254.34, mpid=4806, TLS,
session=<j/3hl85WoNFkCBY+>
Aug 15 14:03:15 xyzzy dovecot: imap(jeff): Error: namespace configuration
error: Duplicate namespace prefix: ""
Aug 15 14:03:15 xyzzy dovecot: imap(jeff): namespace configuration error:
Duplicate namespace prefix: "" in=0 out=357
Aug 15 14:04:51 xyzzy dovecot: lda(jeff): Error: User initialization
failed: namespace configuration error: Duplicate namespace prefix: ""
Aug 15 14:04:51 xyzzy dovecot: lda: Fatal: Invalid user settings. Refer to
server log for more information.


# dovecot -n
# 2.2.31 (65cde28): /etc/dovecot/dovecot.conf
# OS: Linux 4.12.5-300.fc26.x86_64 x86_64 Fedora release 26 (Twenty Six)
ext4
mail_location = mbox:/home/%u/mail:INBOX=/home/%u/mbox
mail_plugins = snarf zlib
mbox_write_locks = fcntl
namespace Snarf {
  hidden = yes
  list = no
  location = mbox:/home/%u/mbox:INBOX=/var/spool/mail/%u:INDEX=MEMORY
  prefix = ~~Snarfbox/
  separator = /
}
namespace default {
  inbox = yes
  location =
  prefix =
  separator = /
}
namespace inbox {
  location =
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix =
}
passdb {
  driver = pam
}
plugin {
  mail_log_events = delete undelete expunge copy mailbox_delete
mailbox_rename
  mbox_snarf = /home/%u/mbox
  snarf = ~~Snarfbox/INBOX
}
protocols = imap pop3
service imap-login {
  inet_listener imap {
    address = localhost
  }
}
service pop3-login {
  inet_listener pop3 {
    address = localhost
  }
}
service postlogin {
  executable = script-login -d rawlog
}
ssl_cert = </etc/letsencrypt/live/www.bubble.org/fullchain.pem
ssl_key =  # hidden, use -P to show it
userdb {
  driver = passwd
}
protocol imap {
  mail_max_userip_connections = 15
  mail_plugins = snarf zlib imap_zlib
}