dovecot.conf

disable_plaintext_auth = yes

mail_privileged_group = mail
mail_location = mbox:~/mail:INBOX=/var/mail/%u
userdb {
  driver = passwd
}
passdb {
  args = %s
  driver = pam
}
protocols = imap

protocol imap {
  mail_plugins = autocreate
}
plugin {
  autocreate = Trash
  autocreate2 = Sent
  autocreate3 = Drafts
autocreate4 = Junk
  autosubscribe = Trash
  autosubscribe2 = Sent
  autosubscribe3 = Drafts
autosubscribe4 = Junk
}

service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}

ssl=required
ssl_cert = </etc/ssl/certs/mail.esimerkki.com.pem
ssl_key = </etc/ssl/private/mail.esimerkki.com.key