Stabilize your clients’ domainsand prove the work.
Scan every client domain free across SPF, DKIM, DMARC, SSL, DNS, MX, blacklists and uptime. Open a stabilization window to fix what’s broken — and hand your client documented evidence of what was done and what improved.
Free diagnosis — six checks, every domain. Free to run, pay only to stabilize.
The window stabilizes — a guided cycle with copy-ready DNS fixes. One-time, no subscription.
The Watcher protects what you fixed — so a stabilized domain doesn’t quietly regress.
Built by independent makers
🛡️ We don’t sell data
How it works
Set up your domains
Create your account and organize your clients’ domains in workspaces. Run a free diagnostic across all six checks — SPF, DKIM, DMARC, SSL, DNS, MX, blacklists and uptime. No payment, no card.
Stabilize
Open a stabilization window on any domain. A guided cycle with copy-ready DNS fixes, closing with documented evidence of what was done and what improved. One-time, no subscription.
Protect what you fixed
Turn on the Regression Watcher so a stabilized domain doesn’t quietly slip back. Optional, cancel anytime.
6 diagnostics in a single scan
Deliverability
SPF · DKIM · DMARCChecked for real — not just “present”. Catches the alignment and record errors that quietly send your client’s mail to spam. Copy-ready DNS fixes included.
SSL / TLS
Certificate validity, chain, and expiry — including the ones people forget, like www. Know before it expires, not after your client calls.
DNS
A, AAAA, CNAME, NS and TXT, checked for drift and broken configs. Catches silent changes before they take a site or mailbox down.
MX
Mail routing, priority, redundancy and reachability. Confirms your client can actually receive email — and flags what’s missing if they can’t.
Blacklists
Checks whether the domain or its mail server landed on a spam blacklist — the thing that tanks deliverability without warning.
Uptime
Multi-region availability and response time, so an outage shows up in your report, not in your client’s complaint.
See all six on your domain
Pricing
Diagnose free. Pay once to stabilize. Add regression watch only if you want it.
Diagnose
Create your account and scan any domain across all six checks. Copy-ready DNS fixes included. No card, no subscription.
Stabilization window
Open a window on any domain and get a guided cycle: baseline, periodic re-scans, an action plan with copy-ready DNS fixes, and a closing report with documented evidence of what was done and what improved. A window runs for a set period — visible the whole time — and then closes.
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per domain — one-time
Managing many clients? Buy windows in packs — the bigger the pack, the less you pay per window — and spend them across the year. No subscription, credits valid for 12 months.
Regression Watcher
When a window closes, the Watcher takes over automatically — free for the first 90 days. It uses the stabilized state as its baseline and alerts you only when something regresses, not every time a record moves. You’ll see exactly what it caught before you ever pay for it.
After that, it’s a single flat subscription based on how many domains you watch at the same time — not how many you own:
Turn watching on or off per domain anytime — register a hundred, watch the ones that matter this month. Optional, cancel anytime.
A generic monitor tells you a record changed. The Watcher knows the baseline you paid to reach — so it tells you when you’re losing ground.
Prices apply once you’re in. Domain Stabilizer is currently in limited early access.
Safe purchase
One-time window, no subscription · 14-day refund via Paddle · Secure checkout — Paddle is Merchant of Record
Start with a free diagnosis
Scan any client domain across all six checks — free, no card. You see exactly what’s broken; then you decide whether to open a stabilization window.
Frequently asked questions
Answers about scanning, stabilization windows, the Watcher, payments and support.
A tool for agencies and teams that manage client domains. It diagnoses six areas — deliverability (SPF/DKIM/DMARC), SSL, DNS, MX, blacklists and uptime — then guides you through a stabilization window to fix what’s broken and prove it to your client.
Yes. Scan any domain across all six checks at no cost — no account, no card. You only pay when you open a stabilization window.
Yes — a quick signup with your email. It’s free; you only pay when you choose to stabilize a domain.
ES, EN and PT (interface and reports).
At /en/status. History and RSS/Atom/iCal at /en/status/history.
Enter a domain and Domain Stabilizer queries public DNS records (SPF, DKIM, DMARC, MX, SSL, etc.). We never touch your email or servers.
Six modules in a single run: Deliverability (SPF/DKIM/DMARC), SSL/TLS, DNS, MX, Blacklists and Uptime.
Most often it’s a deliverability misconfiguration — a broken SPF record, a missing DKIM signature, or DMARC that isn’t aligned. The free scan checks all three and tells you exactly what to fix, with copy-ready DNS records.
The scan detects SPF errors (too many lookups, missing includes, wrong syntax) and gives you the corrected record to paste at your DNS provider. Then re-scan to confirm it’s valid.
No. We provide diagnostics and copy-paste recipes. You apply changes at your DNS provider (Cloudflare, GoDaddy, etc.).
We only read public DNS. Encryption in transit (TLS), minimal access controls. Details at /en/legal/privacy and /en/legal/security.
A guided cycle you open on a domain. It takes a baseline, re-scans periodically, gives you an action plan with copy-ready DNS fixes, and closes with a report documenting what was done and what improved. One-time payment, no subscription.
It runs for a set period, visible the whole time, then closes.
You still get the full diagnosis and the exact fixes to apply. You (or whoever manages the DNS) apply them — we verify the result on the next scan. Domain Stabilizer never needs access to your DNS.
Yes — packs let you buy windows in bulk at a lower cost per window, valid for 12 months. Ideal if you manage many clients. See /en/pricing.
After a window closes, the Watcher keeps that stabilized domain from quietly slipping back. It uses the closing state as its baseline and alerts you only when something regresses — not on every change.
It’s free for the first 90 days after a window closes. After that it’s optional, from a flat monthly price by portfolio size — you choose whether to continue. See /en/pricing.
The Watcher is — optional and cancel-anytime. The stabilization window is not: that’s a one-time payment.
Diagnosis is free. A stabilization window is a one-time payment per domain — see current pricing at /en/pricing. The optional Watcher is a flat monthly subscription by portfolio size.
Paddle (our Merchant of Record) calculates and collects VAT/GST where applicable.
14-day guarantee. Covered cases and process at /en/legal/refund.
Credit/debit cards, PayPal and other local methods processed by Paddle.
Email support@domainstabilizer.com or use the form at Contact. We reply in 24-48 business hours (ES/EN/PT).
