---
title: "Email notification error: Client does not have permissions to send as this sender"
slug: "smtp-configuration-bdat-command-error"
updated: 2026-11-05T06:45:38Z
published: 2026-11-05T06:45:38Z
canonical: "docs.biztalk360.com/smtp-configuration-bdat-command-error"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.biztalk360.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Email notification error: Client does not have permissions to send as this sender

#### Problem Description

While sending an email notification from BizTalk360, you may encounter the following error

> [!CAUTION]
> BDAT command has been rejected by the server. The server responded: 550 5.7.1 Client does not have permissions to send as this sender

This error occurs when the email address configured as the sender does not have permission to send emails through the configured mail server.

#### Solution

To resolve this issue, update the **From** email address configured in [**Manage Email Template**](/v12/docs/manage-email-template).

- Navigate to: **Settings → Notifications → Manage Email Template → Edit Email Template**
- In the email template, locate the **From Email Address** field.
- By default, it may be configured as: `no-reply@biztalk360.com`
- Change this address to your organization's approved email address or another valid email address that has permission to send emails through the configured mail server.

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-YLIEXV8V.png)

After updating the **From** email address,

1. **Save** the email template,
2. **Restart** the BizTalk360 monitoring service, and try sending the notification again.