Hello,

when Dovecot launches (and pretty much at any action afterwards) it always throws following error:

| managesieve: Fatal: Plugin 'sieve_imapsieve' not found from directory /usr/lib/dovecot/modules/sieve
| config: Error: managesieve-login: dump-capability process returned 89

dovecot-sieve and dovecot-managesieved are both installed and the only plugin in the mentioned folder is `lib90_sieve_extprograms_plugin.so`.

`doveconf -n` output:

# 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.13 (7b14904)
managesieve(username): Fatal: Plugin 'sieve_imapsieve' not found from directory /usr/lib/dovecot/modules/sieve
doveconf: Error: managesieve-login: dump-capability process returned 89
# OS: Linux 4.4.0-101-generic x86_64 Ubuntu 16.04.3 LTS
auth_mechanisms = plain login
mail_gid = vmail
mail_home = /var/vmail/mailboxes/%d/%n
mail_location = maildir:~/mail:LAYOUT=fs
mail_privileged_group = vmail
mail_uid = vmail
namespace inbox {
  inbox = yes
  location =
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox Spam {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Trash {
    auto = subscribe
    special_use = \Trash
  }
  prefix =
}
passdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
plugin {
  imapsieve_mailbox1_before = file:/var/vmail/sieve/global/learn-spam.sieve
  imapsieve_mailbox1_causes = COPY
  imapsieve_mailbox1_name = Spam
  imapsieve_mailbox2_before = file:/var/vmail/sieve/global/learn-ham.sieve
  imapsieve_mailbox2_causes = COPY
  imapsieve_mailbox2_from = Spam
  imapsieve_mailbox2_name = *
  quota = maildir:User quota
  quota_exceeded_message = Benutzer %u hat das Speichervolumen überschritten. / User %u has exhausted allowed storage space.   sieve = file:/var/vmail/sieve/%d/%n/scripts;active=/var/vmail/sieve/%d/%n/active-script.sieve
  sieve_before = /var/vmail/sieve/global/spam-global.sieve
  sieve_global_extensions = +vnd.dovecot.pipe
  sieve_pipe_bin_dir = /usr/bin
  sieve_plugins = sieve_imapsieve sieve_extprograms
}
protocols = imap lmtp sieve
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
  unix_listener auth-userdb {
    group = vmail
    mode = 0660
    user = vmail
  }
}
service imap-login {
  inet_listener imap {
    port = 143
  }
}
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    group = postfix
    mode = 0660
    user = postfix
  }
  user = vmail
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
}
ssl = required
ssl_cert = </etc/letsencrypt/live/mail.domain.tld/fullchain.pem
ssl_cipher_list = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA
ssl_dh_parameters_length = 2048
ssl_key = </etc/letsencrypt/live/mail.domain.tld/privkey.pem
ssl_prefer_server_ciphers = yes
ssl_protocols = !SSLv3
userdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
protocol imap {
  imap_idle_notify_interval = 29 mins
  mail_max_userip_connections = 20
  mail_plugins = " quota imap_quota imap_sieve"
}
protocol lmtp {
  mail_plugins = " sieve"
  postmaster_address = postmas...@domain.tld
}

Thanks in advance.

Chris


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