first commit

calcom/packages/lib/serverConfig.ts

@@ -0,0 +1,61 @@
+import type SendmailTransport from "nodemailer/lib/sendmail-transport";
+import type SMTPConnection from "nodemailer/lib/smtp-connection";
+
+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;
+  }
+
+  if (process.env.EMAIL_SERVER_HOST) {
+    const port = parseInt(process.env.EMAIL_SERVER_PORT || "");
+    const auth =
+      process.env.EMAIL_SERVER_USER && process.env.EMAIL_SERVER_PASSWORD
+        ? {
+            user: process.env.EMAIL_SERVER_USER,
+            pass: process.env.EMAIL_SERVER_PASSWORD,
+          }
+        : undefined;
+
+    const transport = {
+      host: process.env.EMAIL_SERVER_HOST,
+      port,
+      auth,
+      secure: port === 465,
+      tls: {
+        rejectUnauthorized: !isENVDev,
+      },
+    };
+
+    return transport;
+  }
+
+  return {
+    sendmail: true,
+    newline: "unix",
+    path: "/usr/sbin/sendmail",
+  };
+}
+
+export const serverConfig = {
+  transport: detectTransport(),
+  from: process.env.EMAIL_FROM,
+  headers: getAdditionalEmailHeaders()[process.env.EMAIL_SERVER_HOST || ""] || undefined,
+};