diff --git a/backend/.env.template b/backend/.env.template
index 8361b8bd2..d398c2265 100644
--- a/backend/.env.template
+++ b/backend/.env.template
@@ -14,6 +14,7 @@ SMTP_PORT=
 SMTP_IGNORE_TLS=true
 SMTP_USERNAME=
 SMTP_PASSWORD=
+SMTP_SECURE="false" # true for 465, false for other ports
 SMTP_DKIM_DOMAINNAME=
 SMTP_DKIM_KEYSELECTOR=
 SMTP_DKIM_PRIVATKEY=