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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.
1

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.
2

Configure SMTP Settings

Fill in the SMTP fields with your mySMTP credentials:
3

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.

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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.