Disable SSLv3 in Dovecot imap server

Disable SSLv3 in Dovecot imap server to avoid POODLE vulnerability

roles/mailserver/files/etc_dovecot_conf.d_10-ssl.conf

 #ssl_parameters_regenerate = 168
 
 # SSL protocols to use
-#ssl_protocols = !SSLv2
+ssl_protocols = !SSLv2 !SSLv3
 
 # SSL ciphers to use
 #ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL