Configure Postmark on WordPress -- 2

I’d like Postmark to handle all the registration-receipt emails my WordPress site sends to new users. Right now the built-in mailer drops the messages into spam, so I need a clean Postmark setup, fully verified and tested.

Here’s what needs to happen:

• Connect my domain to Postmark: update SPF, DKIM and Return-Path records until Postmark shows the domain as “verified”.
• Install and configure the official Postmark plugin (or a better alternative if you have one) on my WordPress site and enter the API key securely.
• Build a simple “Thanks for registering” template inside Postmark, pulling the user’s name and any relevant data from WordPress.
• Trigger the template automatically after each successful registration and run end-to-end tests so I can see the email land in an inbox—not spam—within a few minutes.
• Provide a short handover note with the steps you took and where to update the template text in the future.

Everything happens on a live site, so please take care to avoid downtime while you’re working. Once the above items are complete and tested, the job is done.