diff --git a/rest/controllers/smtp_config_controller.go b/rest/controllers/smtp_config_controller.go
index 6861224..932ac0d 100644
--- a/rest/controllers/smtp_config_controller.go
+++ b/rest/controllers/smtp_config_controller.go
@@ -86,6 +86,22 @@ func TestSmtpConfig(c *fiber.Ctx) error {
 	if err := c.BodyParser(&body); err != nil || body.Email == "" {
 		return c.Status(400).JSON(fiber.Map{"error": "Email de destino requerido"})
 	}
+
+	// Recargar siempre la config activa desde BD para evitar usar credenciales
+	// del .env que pudieran estar desactualizadas en memoria.
+	cfg, err := models.GetSmtpConfig()
+	if err != nil {
+		return c.Status(500).JSON(fiber.Map{"error": "No hay configuración SMTP activa"})
+	}
+	app.Http.Mail.Host = cfg.Host
+	app.Http.Mail.Port = cfg.Port
+	app.Http.Mail.Username = cfg.Username
+	app.Http.Mail.Password = utils.Decrypt(cfg.Password, app.Http.Server.Key)
+	app.Http.Mail.Encryption = cfg.Encryption
+	app.Http.Mail.FromAddress = cfg.FromAddress
+	app.Http.Mail.FromName = cfg.FromName
+	app.Http.Mail.SetupMailer()
+
 	htmlBody := "<h2>Test SMTP</h2><p>La configuración SMTP funciona correctamente.</p>"
 	if err := app.Http.Mail.Send(body.Email, "Test SMTP - U-site", htmlBody); err != nil {
 		return c.Status(500).JSON(fiber.Map{"error": err.Error()})