Vorraussetzung: exim4 cyrus-imapd
/etc/exim4/conf.d/transport/30_exim4-config_cyrus_deliver :
cyrus_delivery:
driver = lmtp
socket = /var/run/cyrus/socket/lmtp
batch_max = 20
group = mail
/etc/exim4/update-exim4.conf.conf :
dc_localdelivery='cyrus_delivery'
update-exim4.conf /etc/init.d/exim4 restart