feat: add resend email transport (#12645)

Co-authored-by: Erik <erik@erosemberg.com>

.env.example

@@ -196,6 +196,10 @@ EMAIL_SERVER_PORT=1025
 # Make sure to run mailhog container manually or with `yarn dx`
 E2E_TEST_MAILHOG_ENABLED=
 
+# Resend
+# Send transactional email using resend
+# RESEND_API_KEY=
+
 # **********************************************************************************************************
 
 # Set the following value to true if you wish to enable Team Impersonation

packages/lib/serverConfig.ts

@@ -6,6 +6,20 @@ import { isENVDev } from "@calcom/lib/env";
 import { getAdditionalEmailHeaders } from "./getAdditionalEmailHeaders";
 
 function detectTransport(): SendmailTransport.Options | SMTPConnection.Options | string {
+  if (process.env.RESEND_API_KEY) {
+    const transport = {
+      host: "smtp.resend.com",
+      secure: true,
+      port: 465,
+      auth: {
+        user: "resend",
+        pass: process.env.RESEND_API_KEY,
+      },
+    };
+
+    return transport;
+  }
+
   if (process.env.EMAIL_SERVER) {
     return process.env.EMAIL_SERVER;
   }

turbo.json

@@ -337,6 +337,7 @@
     "ZOHOCRM_CLIENT_ID",
     "ZOHOCRM_CLIENT_SECRET",
     "ZOOM_CLIENT_ID",
-    "ZOOM_CLIENT_SECRET"
+    "ZOOM_CLIENT_SECRET",
+    "RESEND_API_KEY"
   ]
 }