diff --git a/data/conf/dovecot/dovecot.conf b/data/conf/dovecot/dovecot.conf
index b3e45171..9acbfbe7 100644
--- a/data/conf/dovecot/dovecot.conf
+++ b/data/conf/dovecot/dovecot.conf
@@ -281,10 +281,8 @@ plugin {
   #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_level = 9
   zlib_save = lz4
 }
-
 dict {
   sqlquota = mysql:/usr/local/etc/dovecot/sql/dovecot-dict-sql-quota.conf
   sieve_after = mysql:/usr/local/etc/dovecot/sql/dovecot-dict-sql-sieve_after.conf