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

# Connect Atomic Mail Sender to mySMTP

> Configure Atomic Mail Sender with mySMTP using secure SMTP credentials on port 587 and TLS encryption for controlled email delivery.

Atomic Mail Sender lets you configure your own SMTP server for full control over email delivery. Follow these steps to set up **Atomic Mail Sender** with secure settings.

<Steps>
  <Step title="Open Atomic Mail Sender">
    1. Launch **Atomic Mail Sender**.
    2. Go to the top menu and click **Settings** > **Common Settings**.
    3. In the left-hand menu, choose **SMTP**.
  </Step>

  <Step title="Configure SMTP Settings">
    Fill in the SMTP fields with your **mySMTP** credentials:

    | Field | Value |
    | - | - |
    | **SMTP Server (host)** | relay.xx.xxx (from setup email) |
    | **Port** | 587 |
    | **Use Secure Connection** | Yes (select **TLS** or STARTTLS if shown) |
    | **Authentication** | Yes |
    | **Login (username)** | Your full mySMTP username |
    | **Password** | Your mySMTP password |
    | **Sender Email** | e.g., [you@yourdomain.com](mailto:you@yourdomain.com) |
  </Step>

  <Step title="Test the Connection">
    1. Click **Test Connection** or **Send Test Email** (depending on version).
    2. Check that the test message is sent and received successfully.
  </Step>
</Steps>

### TLS vs SSL

* Choose **TLS (STARTTLS)** — do **not** use SSL on port 465.
* Always use **Port 587** when sending through mySMTP with Atomic Mail Sender.


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