diff --git a/docker-compose.yml b/docker-compose.yml
index 187e6a8..54867a4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -47,10 +47,11 @@ services:
       REDIS_PASSWORD: "null"
       MAIL_MAILER: smtp
       MAIL_HOST: mail.2487.eu
-      MAIL_PORT: "465"
+      # Poort 587 (STARTTLS), NIET 465: Hetzner knijpt uitgaand 25/465 af op de CX33.
+      MAIL_PORT: "587"
       MAIL_USERNAME: ${MAIL_USERNAME}
       MAIL_PASSWORD: ${MAIL_PASSWORD}
-      MAIL_ENCRYPTION: ssl
+      MAIL_ENCRYPTION: tls
       MAIL_FROM_ADDRESS: ${MAIL_FROM_ADDRESS}
       MAIL_FROM_NAME: "OpnForm"
       JWT_TTL: "1440"