Hello, unfortunatly, TLS doesn't seem to work on LMTP, anyway, not by simply put ssl=yet to the lmtp inet_listener. I've tried and when I *openssl s_client -connect* to the lmtp listener I've got the following response : CONNECTED(00000003) 34379118248:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:/usr/src/secure/lib/libssl/../../../crypto/openssl/ssl/s23_clnt.c:766: My postfix server can't neither establish a TLS connection on LMTP listener. On 22.10.2013, at 14.37, Jogi Hofm?ller <jogi at mur.at> wrote: Can dovecot use TLS/SSL on LTMP inet socket? Oct 26, 2013 8:11:19 am ?, Timo Sirainen <tss at iki.fi> replied:? Probably. Try adding ssl=yes to the inet_listener {}. --------------------------------------------------------------- Stanislas SABATIER s.sabatier at pobox.com ---------------------------------------------------------------