diff --git a/rocketchat/.env b/rocketchat/.env
index 51b0e69..35f5deb 100644
--- a/rocketchat/.env
+++ b/rocketchat/.env
@@ -4,5 +4,5 @@ DOCKER_MY_NETWORK=caddy_net
 
 # Rocket Chat Specific
 ROOT_URL=https://subdomain.example.com
-MAIL_URL=smtp.mailgun.org
+SMTP_MAIL_URL=smtp.mailgun.org
 ROCKETCHAT_BOT_PASSWORD=samplebotpassword
\ No newline at end of file