How do I add a new sender domain in Postal?

You can use the same Postal service to send emails with addresses on different domains. This guide explains how to add a new domain via Postal’s web-based interface.

1. Begin by logging on to Postal’s control panel.
2. Click on the mail server to which you want to add the domain. As long as you haven’t set up multiple mail servers yourself, you should only have one choice here.
3. Click the menu item Domains.
   
4. Now click the Add new domain button.
   
5. Enter the domain name you want to connect to Postal, select DNS as verification method and click Create Domain.
6. You will now be asked to create a TXT record on the domain to verify that you have control of the domain name.
   If your domain uses our DNS servers, you can follow the instructions here to create the DNS record. Once created, it should look like this:
   Then click on the Verify TXT record button in the Postal web GUI.
7. If you created the DNS record for the verification correctly, you will see a green box in the top left corner confirming that the domain is now verified.
8. What remains now is to create/edit the DNS records that Postal uses, i.e. adjust your SPF and add a DKIM and set up a so-called Return Path.
   If your domain uses our DNS servers, you can add the information following this guide. When you are done, it should look like this (replace domain.com with your domain):
9. Within the Postal web interface, you can now click on the button Check my records are correct.
10. If everything is set up correctly, you will see a green box in the top left corner to confirm.

You are now ready to start using your new domain with Postal!