LMTP doesn't save to +mailbox

[@lbutlr]

Since switching to lmtp in dovecot, mail to user+mailboix at example.com does not get saved in ‘.mailbox’ as it did with LDA, instead it gets saved into the INBOX. If it matters, these are users who do NOT have a ~/.active_sieve file. I could understand (though it would bene a bit annoying) if the save overrode this mechanism.

I did add  lmtp_save_to_detail_mailbox = yes in the protocol lmtp block

protocol lmtp {
  postmaster_address = postmaster at covisp.net   # required
  mail_plugins = quota sieve
  info_log_path = /var/log/dovecot-lmtp.log
  lmtp_save_to_detail_mailbox = yes
}

This is the error I am getting when sending to luser+covisp at covisp.net

lmtp(luser at covisp.net)<91193><EqkiJV70A105ZAEAIdGjjQ>: Error: sieve: msgid=<A3ED963A-97FB-4A1F-9F09-45F2AEA96CF6 at kreme.com>: failed to store into mailbox 'covisp': Mailbox doesn't exist: covisp

lmtp(luser at covisp.net)<91193><EqkiJV70A105ZAEAIdGjjQ>: Error: sieve: Execution of script /usr/lib/dovecot/sieve/default.sieve failed with unsuccessful implicit keep

# cat /usr/lib/dovecot/sieve/default.sieve                                                                                                                                 [13:32] [/var/log] 
require "fileinto";
if header :contains "X-spam-flag" "YES" {
     fileinto "Junk";
}

(This file hasn’t changed in a year, so it worked fine with the lda instead of the lmtp setup. I mean, I can probably just write a sieve to do it. Let me think…

if header :regex "to" “+(.*)@" {
   fileinto :create “${1}";
   stop;
}

Seems like it should work. Should I add this to default.sieve?

# 2.3.6 (7eab80676): /usr/local/etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.6 (92dc263a)
# OS: FreeBSD 11.2-RELEASE-p10 i386  
# Hostname: mail.covisp.net
auth_failure_delay = 5 secs
auth_mechanisms = PLAIN LOGIN
default_client_limit = 4096
default_process_limit = 1024
default_vsz_limit = 768 M
disable_plaintext_auth = no
first_valid_uid = 89
imap_id_log = *
login_log_format_elements = user=<%u> %r %m %c
mail_location = maildir:~/Maildir
mail_max_userip_connections = 90
managesieve_notify_capability = mailto
managesieve_sieve_capability = editheader fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
namespace inbox {
  inbox = yes
  location = 
  mailbox Archive {
    auto = subscribe
    special_use = \Archive
  }
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = /usr/local/etc/dovecot/sql.conf
  driver = sql
}
plugin {
  imapsieve_mailbox1_before = file:/usr/lib/dovecot/sieve/report-spam.sieve
  imapsieve_mailbox1_causes = COPY
  imapsieve_mailbox1_name = Junk
  imapsieve_mailbox2_before = file:/usr/lib/dovecot/sieve/report-ham.sieve
  imapsieve_mailbox2_causes = COPY
  imapsieve_mailbox2_from = Junk
  imapsieve_mailbox2_name = *
  imapsieve_mailbox3_before = file:/usr/lib/dovecot/sieve/mark-read.sieve
  imapsieve_mailbox3_causes = COPY
  imapsieve_mailbox3_name = Archive
  quota_rule2 = .EXPUNGED:ignore
  sieve = file:~/.sieve;active=~/.active_sieve
  sieve_default = /usr/lib/dovecot/sieve/default.sieve
  sieve_default_name = spamassassin
  sieve_extensions = +editheader
  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment
  sieve_pipe_bin_dir = /usr/lib/dovecot/sieve
  sieve_plugins = sieve_imapsieve sieve_extprograms
  sieve_user_log = ~/sieve.log
}
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
}
service imap-login {
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    group = postfix
    mode = 0600
    user = postfix
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 0
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
service stats {
  unix_listener stats-reader {
    group = dovecot
    mode = 0666
    user = 
  }
  unix_listener stats-writer {
    group = dovecot
    mode = 0666
    user = 
  }
}
ssl_cert = </usr/local/etc/dehydrated/certs/covisp.net/fullchain.pem
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_min_protocol = TLSv1.1
userdb {
  args = /usr/local/etc/dovecot/sql.conf
  default_fields = uid=vpopmail gid=vchkpw mail_location=maildir:/usr/local/virtual/%u/Maildir mail=maildir:/usr/local/virtual/%u/Maildir
  driver = sql
}
protocol imap {
  mail_plugins = " imap_sieve"
}
protocol lmtp {
  info_log_path = /var/log/dovecot-lmtp.log
  lmtp_save_to_detail_mailbox = yes
  mail_plugins = quota sieve
  postmaster_address = postmaster at covisp.net
}