A beginner-friendly map of email deliverability
#email#deliverability#learning
Here is the mental model that finally made email click for me.
The three trust records
- SPF says which servers are allowed to send for your domain.
- DKIM is a cryptographic signature proving a message wasn’t tampered with.
- DMARC ties them together and tells inboxes what to do if checks fail.
Why a separate sending subdomain
If you blast a lot of email and people mark it as spam, your domain’s reputation
drops. Sending from a dedicated subdomain (like send.example.com) keeps that risk
away from your primary address. Reputation is built per-(sub)domain.
This is the setup I’m using for this very newsletter.