About

We help good emails reach real inboxes.

Inbox Ready has published plain-language guides to email deliverability since 2021. We explain why emails end up in spam and give you the exact steps to fix it, without assuming you already know the jargon.

Why this site exists

People spend hours on a newsletter, send it to their whole list and hear nothing back. Later they find out most of it landed in spam or the Promotions tab. The writing was fine. The setup was not.

Deliverability is full of acronyms and settings that most guides assume you already understand. We take each one and explain it in plain words, with the exact steps to fix it, so beginners can follow along and developers can check the details.

What we cover

  • Domain authentication: SPF, DKIM and DMARC
  • Mailbox provider rules from Gmail, Yahoo and Microsoft
  • Bounces, complaints, blocklists and sender reputation
  • List hygiene, consent and warming up new domains

Keeping guides current

Inbox rules change. When Gmail, Yahoo or Microsoft change their requirements, we review every affected guide and update the date at the top. If you spot something out of date, tell us and we will check it within a week.

Report an outdated guide →

Along the way

  1. February 16, 2021Why your emails go to spam, and how to fix it
  2. July 20, 2021SPF, DKIM and DMARC explained without the headache
  3. February 6, 2024The Gmail, Yahoo and Outlook sender rules, explained simply
  4. March 25, 2025Double opt in vs single opt in: which is better for your list?