diff --git a/Docker-Mail-Server.md b/Docker-Mail-Server.md
index dd5b5ce..8b35933 100644
--- a/Docker-Mail-Server.md
+++ b/Docker-Mail-Server.md
@@ -44,6 +44,7 @@ services:
     container_name: mailserver
     # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)
     hostname: mail.xxx.xx
+    #邮箱域名
     env_file: mailserver.env
     # More information about the mail-server ports:
     # https://docker-mailserver.github.io/docker-mailserver/latest/config/security/understanding-the-ports/
@@ -59,7 +60,8 @@ services:
       - ./docker-data/dms/mail-logs/:/var/log/mail/
       - ./docker-data/dms/config/:/tmp/docker-mailserver/
       - /etc/localtime:/etc/localtime:ro
-      - ./ssl/:/tmp/ssl:ro
+      - ./ssl/:/tmp/ssl/
+      #证书文件存放位置
     restart: always
     stop_grace_period: 1m
     # Uncomment if using `ENABLE_FAIL2BAN=1`: