I double checked that the start_tls = no was correctly set in files
:~/conf$ ls -al ldap*
-rw-r----- 1 zimbra zimbra 441 Aug 5 23:12 ldap-scm.cf
-rw-r----- 1 zimbra zimbra 369 Aug 5 23:12 ldap-transport.cf
-rw-r----- 1 zimbra zimbra 357 Aug 5 23:12 ldap-vad.cf
-rw-r----- 1 zimbra zimbra 500 Aug 5 23:12 ldap-vam.cf
-rw-r----- 1 zimbra zimbra 357 Aug 5 23:12 ldap-vmd.cf
-rw-r----- 1 zimbra zimbra 351 Aug 5 23:12 ldap-vmm.cf
it actually was not but fixing it and restart did not help. The mail.err still displays:
Aug 5 23:12:28 localhost postfix/cleanup[29941]: fatal: too many errors - program terminated
Aug 5 23:12:34 localhost postfix/trivial-rewrite[29991]: error: dict_ldap_connect: Unable to set STARTTLS: -11: Connect error
Aug 5 23:12:34 localhost postfix/trivial-rewrite[29991]: error: dict_ldap_connect: Unable to set STARTTLS: -11: Connect error
Aug 5 23:12:34 localhost postfix/cleanup[29943]: error: dict_ldap_connect: Unable to set STARTTLS: -11: Connect error
Aug 5 23:12:34 localhost last message repeated 12 times  |