dovecot/templates/default/conf.d/20-lmtp.conf.erb

##
## LMTP specific settings
##

# Support proxying to other LMTP/SMTP servers by performing passdb lookups.
<%= Dovecot::Conf.attribute(@conf, 'lmtp_proxy', false) %>

# When recipient address includes the detail (e.g. user+detail), try to save
# the mail to the detail mailbox. See also recipient_delimiter and
# lda_mailbox_autocreate settings.
<%= Dovecot::Conf.attribute(@conf, 'lmtp_save_to_detail_mailbox', false) %>

<% if @protocols['lmtp'].kind_of?(Hash) and @protocols['lmtp'].length > 0 -%>
<%=  Dovecot::Conf.protocol('lmtp', @protocols['lmtp']) %>
<% else -%>
protocol lmtp {
  # Space separated list of plugins to load (default is global mail_plugins).
  #mail_plugins = $mail_plugins
}
<% end -%>