diff --git a/src/config.ts b/src/config.ts
index 3e2bf7f..08af1ac 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -14,8 +14,8 @@ export const config = {
     app_url: process.env.APP_URL || "http://localhost:8080",
     privacy_url: process.env.PRIVACY_URL || "/privacy",
     imprint_url: process.env.IMPRINT_URL || "/imprint",
-    mailer_url: process.env.MAILER_URL || "http://localhost:8080/mailer",
-    mailer_key: process.env.MAILER_KEY || "pleasesetme"
+    mailer_url: process.env.MAILER_URL || "",
+    mailer_key: process.env.MAILER_KEY || ""
 }
 let errors = 0
 if (typeof config.internal_port !== "number") {
@@ -24,6 +24,9 @@ if (typeof config.internal_port !== "number") {
 if (typeof config.development !== "boolean") {
     errors++
 }
+if (config.mailer_url == "" || config.mailer_key == "") {
+    errors++;
+}
 function getPhoneCodeLocale(): CountryCode {
     return (process.env.PHONE_COUNTRYCODE as CountryCode);
 }