Custom Domains Basics
Many paid email plans, including Tuta's, generally support using your own domain (like hello@yourcompany.com) instead of the provider's default domain. Here's the general concepts involved.
You need to own the domain first
A custom domain generally has to be registered separately through a domain registrar before it can be connected to an email service.
DNS records point mail to the provider
Setting up custom domain email typically involves adding specific DNS records (like MX records) at your domain registrar, pointing incoming mail to the email provider's servers.
Verification confirms ownership
Providers generally require a verification step (like adding a specific TXT record) to confirm you actually control the domain before activating email on it.
Propagation can take time
DNS changes don't always take effect instantly — it can take anywhere from minutes to (in rare cases) up to a day or more to fully propagate.
Exact steps and requirements vary by provider and by domain registrar. Check the official setup documentation for the specific, current steps for your situation.