diff --git a/src/mail/mail.service.ts b/src/mail/mail.service.ts
index ff6a8c9..ac228d7 100644
--- a/src/mail/mail.service.ts
+++ b/src/mail/mail.service.ts
@@ -33,7 +33,8 @@ export class MailService {
     this.transporter = nodemailer.createTransport({
       host: 'smtp.gmail.com',          // o smtp‑relay.gmail.com (ver punto 2)
       port: 587,
-      secure: true,                   // TLS STARTTLS
+      secure: false,
+      requireTLS: true,                  // TLS STARTTLS
       auth: { user: process.env.USER_GMAIL, pass: process.env.APP_PASS },
       pool: true,                      // <‑‑ activa reuse
       maxConnections: 1,               // una sola conexión viva