Apply the BetterCrypto Dovecot configuration, related to #45

dovecot/conf/dovecot.conf

@@ -58,7 +58,10 @@ ssl = yes
 ssl_cert = </certs/cert.pem
 ssl_key = </certs/key.pem
 ssl_protocols=!SSLv3 !SSLv2
-ssl_cipher_list=TLSv1+HIGH !SSLv2 !RC4 !aNULL !eNULL !3DES @STRENGTH
+ssl_cipher_list = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA
+ssl_prefer_server_ciphers = yes
+ssl_dh_parameters_length = 2048
+ssl_options = no_compression
 
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 # Authentication