Keep the technical foundation behind your email healthy
Your authentication and DNS records decide whether inbox providers trust your mail. SpamCipher continuously checks SPF, DKIM, DMARC, your DNS records, and your sending setup, then explains any problem in plain language with a clear fix.
Check your domain
See exactly what inbox providers see
Before a mailbox provider accepts your mail, it checks who you say you are. If your authentication or DNS is misconfigured, your messages get filtered or rejected. SpamCipher checks the same signals and tells you what is wrong.
- Add your domain. Enter your sending domain and SpamCipher reads its public records, with nothing to install.
- We run continuous checks. SpamCipher verifies your authentication and DNS on a schedule, not just once.
- Fix issues with guidance. Every problem comes with a plain-language explanation and the exact record to change.
- SPF record: valid and within the 10-lookup limit
- DKIM signing: a published key that signs your mail
- DMARC policy: a policy and aligned SPF or DKIM
- MX and reverse DNS: mail routing and a matching PTR record
- TLS and optional BIMI: encrypted delivery and a verified logo
From unknown to verified
Add your domain, let SpamCipher watch it, and fix what it finds, in minutes.
Add your domain
Enter the domain you send from. SpamCipher reads its public DNS and authentication records, with nothing to install.
Run continuous checks
We verify SPF, DKIM, DMARC, MX, reverse DNS, and TLS on a schedule, so you always know your current standing.
Fix with guidance
Every issue comes with a plain-language explanation and the exact record to add or change to resolve it.
Find the problems before inbox providers do
Run your first domain check free, no credit card required.
Records break quietly. We keep watching.
A passing check today does not stay passing. DNS changes, providers rotate keys, and a single edit can break SPF or DKIM without anyone noticing until delivery drops.
SpamCipher keeps watching around the clock and tells you the moment something changes, so a broken record becomes a quick fix instead of a slow decline in your reputation.
Get told the moment something breaks
When a check changes from passing to failing, SpamCipher sends an alert so you can act before delivery suffers.
The Domain Health API returns the same results as a structured response, ready to drop into your own monitoring, status pages, or dashboards.
Wire it into your workflow with a few lines of code and keep authentication and DNS health visible across your team.
Explore the APIHow to get the most from domain health monitoring
Start by clearing the failing checks, then tighten what is merely passing. Moving DMARC from p=none toward quarantine or reject, keeping SPF under the lookup limit, and confirming DKIM alignment all raise the trust providers place in your mail.
Treat it as ongoing, not a one-off. Watch for alerts after any DNS change, re-check before a major send, and your authentication, deliverability, and sender reputation stay on solid ground.
