How do I host my own SMTP server?

How do I host my own SMTP server?
Configure a custom SMTP server

Go to Settings > Workspace Settings.
Click Email, click Custom SMTP Settings, and then click Add Custom SMTP Server.
Select Other SMTP and click Continue to set up.
Fill out the form with your server address, port, and credentials. You cannot use port 25.
Click Finish set up.

Configure a custom SMTP server
  1. Go to Settings > Workspace Settings.
  2. Click Email, click Custom SMTP Settings, and then click Add Custom SMTP Server.
  3. Select Other SMTP and click Continue to set up.
  4. Fill out the form with your server address, port, and credentials. You cannot use port 25.
  5. Click Finish set up.
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