EternalSender registers, maintains, and monitors your email-sending identity with participating email providers and sender programs where available, and continuously watch the technical and reputation signals that decide whether your mail reaches the inbox.
See your result instantly, and get the full report by email.
Your result appears on this page immediately. The email adds the details this page cannot see: DKIM keys, TLS records, the exact records we read, and a prioritised fix list. We store your email, domain, and the report we sent so we can follow up if you ask us to. See our privacy policy.
Providers judge your sender identity before they read a word of content. Missing or misconfigured SPF, DKIM, or DMARC makes legitimate mail look unverifiable.
Without an enforced DMARC policy, criminals can send email that appears to come from your domain to your own customers: invoices, payment requests, and “urgent” requests.
DNS records, cryptographic keys, and sending infrastructure change quietly over time. Deliverability decays for months before anyone notices.
A complete, accurate sending profile: who you are, what you send, and from where, the foundation every provider checks first.
We register your sending identity with participating email providers and sender programs where available, through our "whitelisting" process, and configure trusted-sender settings correctly.
SPF, DKIM, and DMARC properly issued, aligned, and verified, with a documented baseline your domain is measured against from day one.
Ongoing checks of your DNS, keys, routing, and reputation signals, with a monthly health report in your client dashboard, plus recommended corrective actions.
When we register your domain, we go past the technical records. We walk your sending identity through the registration and trusted-sender channels at major email providers like Google and Microsoft, completing their programs and requirements for your domain so your legitimate mail is recognized as yours. This is our own process, built from scratch. It did not exist before we built it, and nobody else offers it.
Your whole domain is registered and set up with participating providers, so every legitimate sender under it benefits from the same trusted status.
For your most important addresses, like billing, the owner, or support, we take an additional step and carry that individual sender through our "whitelisting" process too, provider by provider.
We audit your domain’s email posture, fix what’s broken and document the baseline. One-time setup: $149.
Provider registrations and submissions where programs exist; authentication configured and verified end-to-end.
Continuous checks with a plain-English health report and recommended fixes. $19/month or $199/year.
We register your domain with the email providers, publish SPF, DKIM, and DMARC correctly, and run our "whitelisting" process at Google, Microsoft, and the rest. Nobody else does this part.*
We watch your records, keys, and reputation continuously, send a monthly health report, and fix drift before it costs you an inbox.
For billing, owner, support, and other addresses that can never miss: registration, setup, and "whitelisting" for the individual sender, plus its own monitoring.
Every additional domain gets the same treatment at the same rates: $149 setup plus its own monitoring. Volume pricing for teams from 5 senders. See full pricing →
* Third-party SaaS support is available as an add-on. If an outside system sends email as your domain, its authentication is not included in the standard domain setup. See Third-Party Sender Authentication →
Law, accounting, consulting, where a missed proposal or spoofed invoice has real consequences.
Appointment and patient communication that patients trust is actually from you.
Quotes, scheduling, and invoicing that reach customers the first time.
Client-facing mail from custom domains, kept aligned and monitored.
Order confirmations and receipts that don’t land in spam at checkout.
Newsletters and appeals that supporters actually receive.
The two-minute check is free and runs entirely in your browser. When you’re ready, registration starts with a conversation, not a contract.