Mail health
How the email we send is received, as reported by the receiving mail systems themselves (Microsoft, Google, Yahoo, Mimecast and others). Published so you can check it rather than take our word for it. Covers the last 30 days and is refreshed daily.
Our domains
Every receiving system that follows the DMARC standard can send the domain owner a daily report of mail that claimed to come from that domain, and whether it passed the two authentication checks (DKIM and SPF). These are the totals from those reports.
Messages reported by receivers
| Domain | Policy | Messages | Passed | Notes |
|---|---|---|---|---|
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Policy is what we ask receivers to do with mail that fails both checks: reject means refuse it. Sent by another server means mail carrying our address that did not come from our mail service: usually a forwarded copy, or a website contact form sending "as" the visitor. Our policy has those refused, which is the point of it.
Gmail's view
From Google Postmaster Tools: whether Gmail considers the domain to meet its sender requirements (authentication, encryption, DNS, spam complaints, unsubscribe handling), and the highest daily spam and delivery-error rates it measured.
| Domain | Requirements | Spam rate | Delivery errors |
|---|---|---|---|
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Gmail only produces daily figures above a certain volume, so a small sender has data on some days and not others. Gmail's own limit for bulk senders is a 0.30% spam rate.
Encryption of mail sent to us
Receivers also report (TLS-RPT) whether their connections to our mail servers were encrypted. We publish an MTA-STS policy telling senders to insist on encryption.
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How this is measured, and what it is not
- The figures are counts from reports that receivers send us. They are not our own claims about our mail, and we publish them unedited apart from adding them up.
- Nothing here identifies a person, a message, or another organisation: no addresses, no contents, no other companies' servers.
- Not every receiver sends reports, so the totals cover most but not all of our mail. A domain with no reports is listed as such, not as "clean".
- Our mail is sent through our mail provider from the addresses listed in its published SPF record; we read that record fresh on every run.
- The raw figures behind this page: /data/mail-health.json.