Deliverability directory

Live SPF, DKIM, DMARC and MTA-STS audits for 110 well-known domains. Every report is generated by querying public DNS when you open it — nothing here is pre-written, and nothing is stored.

Mailbox providers

What the big consumer providers publish for their own domains.

gmail.com · outlook.com · yahoo.com · icloud.com · proton.me · fastmail.com · zoho.com · gmx.com · aol.com · hey.com · tutanota.com · mail.ru · yandex.com · qq.com · naver.com

Email platforms and senders

The services your mail probably goes through.

mailchimp.com · sendgrid.com · postmarkapp.com · mailgun.com · klaviyo.com · brevo.com · constantcontact.com · activecampaign.com · hubspot.com · salesforce.com · zendesk.com · intercom.com · customer.io · braze.com · twilio.com · resend.com

Banks and payments

Domains most targeted by phishing, where DMARC enforcement matters most.

stripe.com · paypal.com · wise.com · revolut.com · squareup.com · coinbase.com · chase.com · hsbc.com · barclays.co.uk · anz.co.nz · asb.co.nz · westpac.co.nz · bnz.co.nz · kiwibank.co.nz · adyen.com

Technology

How the largest engineering organisations configure their mail.

google.com · microsoft.com · apple.com · amazon.com · meta.com · cloudflare.com · github.com · gitlab.com · atlassian.com · slack.com · notion.so · figma.com · vercel.com · netlify.com · digitalocean.com · openai.com · anthropic.com · linear.app · shopify.com · squarespace.com

Retail and travel

High-volume senders whose deliverability is a commercial problem.

ebay.com · etsy.com · walmart.com · target.com · ikea.com · booking.com · airbnb.com · expedia.com · uber.com · airnz.co.nz · qantas.com · trademe.co.nz · asos.com · zalando.com · wayfair.com

Media and social

Domains that send at enormous scale.

netflix.com · spotify.com · linkedin.com · reddit.com · x.com · pinterest.com · twitch.tv · substack.com · medium.com · nytimes.com · bbc.co.uk · theguardian.com · stuff.co.nz · nzherald.co.nz · rnz.co.nz

Government and education

Public-sector domains, where spoofing has the widest blast radius.

govt.nz · ird.govt.nz · police.govt.nz · health.govt.nz · gov.uk · hmrc.gov.uk · usa.gov · irs.gov · europa.eu · auckland.ac.nz · otago.ac.nz · ox.ac.uk · mit.edu · stanford.edu