Learn
Learn email authentication
What DMARC, SPF, DKIM and BIMI are, and how to set them up in the services you already send with. For how DMARCLoop itself works, see the help centre.
Start with the basics
- What is DMARC? DMARC tells mail receivers what to do with mail that claims to be from your domain but fails SPF and DKIM, and sends you reports on who is sending as you.
- What is SPF? SPF is the DNS record that lists the servers allowed to send mail for your domain. How it works, its limit of 10 lookups, and why it isn't enough alone.
- What is DKIM? DKIM signs each message so a receiver can check it came from a server you authorised and wasn't changed on the way. Selectors, keys and alignment explained.
- What is BIMI? BIMI shows your logo next to your mail in inboxes that support it. What it needs: DMARC at quarantine or reject, an SVG logo and, for Gmail, a VMC or CMC.
Set up the services you send with
One guide per service: DKIM with your domain, SPF where it helps, and how to check it worked.
Mailboxes
Transactional email
Marketing email
CRM
Helpdesk
Business apps
The road to p=reject
Glossary
From aggregate report to void lookup: the terms a rollout uses, a line or two each.
Open the glossary