diff --git a/Caddy-2.x-with-Cloudflare-DNS.md b/Caddy-2.x-with-Cloudflare-DNS.md
index 5044b6e..562f7eb 100644
--- a/Caddy-2.x-with-Cloudflare-DNS.md
+++ b/Caddy-2.x-with-Cloudflare-DNS.md
@@ -43,7 +43,7 @@ services:
       SMTP_HOST: '[MAIL-SERVER]'
       SMTP_FROM: '[E-MAIL]'
       SMTP_PORT: '587'
-      SMTP_SSL: 'true'
+      SMTP_SECURITY: 'starttls'
       SMTP_USERNAME: '[E-MAIL]'
       SMTP_PASSWORD: '[SMTP-PASS]'
 #      ADMIN_TOKEN: '[RAND. GENERATE]'