diff --git a/.env.example b/.env.example
index 4b47705..50a30eb 100644
--- a/.env.example
+++ b/.env.example
@@ -7,4 +7,5 @@ REGISTRATION_URL="https://matrix.example.org/register?token="
 SMTP_HOSTNAME="smtp.example.org"
 SMTP_USERNAME="username"
 SMTP_PASSWORD="password"
+SMTP_PORT="587"
 MAIL_FROM_ADDRESS="me@example.org"