Email authentication guides
Learn how SPF works, understand DKIM and DMARC, or check what needs updating when you change email providers.
What is SPF?
What an SPF record does, which domain it checks and how to read a simple example.
4 min readThe SPF lookup limit
How the ten-lookup limit works, why nested records count and how flattening helps.
3 min readSPF, DKIM and DMARC
What each check does and how they work together to authenticate your email.
3 min readChanging email providers
What to check when adding a sending service, switching providers or removing an old one.
3 min readTemplates and checklists
List the services that send your email and keep track of the checks to make when changing providers.
Download email service list template (CSV)View checklist for changing providersSave checklist for offline use (HTML)
Open the CSV template in a spreadsheet. Print the checklist or save a PDF from your browser’s Print menu.