Am 16.03.2018 um 13:07 schrieb hw: > [...] > # lmtp cmd="lmtpd -a" listen="lmtp:127.0.0.1" prefork=4 > lmtpunix cmd="lmtpd -a" listen="/var/lib/imap/socket/lmtp" > prefork=4 > [...] Both definitions are wrong: 1) the lmtp line man cyrus.conf listen=<no default> The UNIX or internet socket to listen on. This string field is required and takes one of the following forms: path [ host : ] port So listen="lmtp:127.0.0.1" is utterly nonsense. It would be listen="127.0.0.1:lmtp" if you want to restrict access to localhost. 2) the lmtpunix line man lmtpd -a Preauthorize connections initiated on an internet socket, instead of requiring LMTP AUTH. This should only be used for connections coming from trusted hosts. So no pre-auth on the unix socket. And why do you define a prefork of 4? Alexander