Merge pull request #1090 from extremeshok/patch-5

Enable maildir compression

data/conf/dovecot/dovecot.conf

@@ -282,6 +282,8 @@ plugin {
   #mail_crypt_global_private_key = </mail_crypt/ecprivkey.pem
   #mail_crypt_global_public_key = </mail_crypt/ecpubkey.pem
   #mail_crypt_save_version = 2
+  # Enable compression while saving, lz4 Dovecot v2.2.11+
+  zlib_save = lz4
 }
 dict {
   sqlquota = mysql:/usr/local/etc/dovecot/sql/dovecot-dict-sql-quota.conf