diff --git a/src/utils/email.ts b/src/utils/email.ts
index 16c8e76..130d6f0 100644
--- a/src/utils/email.ts
+++ b/src/utils/email.ts
@@ -3,7 +3,8 @@ import { Options } from "nodemailer/lib/mailer";
 import * as process from "process";
 
 const transport = createTransport({
-    service: process.env.MAIL_SERVICE || "gmail",
+    host: process.env.MAIL_SERVER || "smtp.gmail.com",
+    port: parseInt(process.env.MAIL_PORT || "587"),
     auth: {
         user: process.env.MAIL_USER || "noreply@licenseapi.de",
         pass: process.env.MAIL_PASS,
@@ -11,7 +12,7 @@ const transport = createTransport({
 });
 
 export const sendMail = (options: Options, success?: (info: SentMessageInfo) => void, error?: (msg: Error) => void) => transport.sendMail({
-    ...options, from: process.env.USER || "noreply@licenseapi.de",
+    ...options, from: process.env.MAIL_USER || "noreply@licenseapi.de",
 }, (err, info) => {
     if (err !== null && error) return error(err);