Know your email is going to spam before your recipients do
Inboxight watches SPF, DKIM, DMARC, MX and 46 blacklists around the clock, and tells you the moment a record breaks — with the explanation and the fix, not an error code.
Free, no account, no card.
Monitored domain
acme.com
Checked 6 minutes ago
Monitoring that tells you what to do
Not a table of error codes. One clear sentence, the cause, and the steps that fix it.
Your SPF triggers 12 DNS lookups and the limit is 10: past that, receivers treat it as an error — exactly as if you had none.
What to do
- 1 Drop the services you no longer use include:_spf.google.com (4), include:sendgrid.net (3), include:mailgun.org (2)…
- 2 Flatten the includes you keep Replace the most expensive include: entries with the ip4: ranges they publish.
- 3 Re-check after you change it DNS propagation takes a few minutes.
What other tools hide behind an error code
- SPF: DNS lookups, +all, broken includes, duplicate records
- DKIM: 35 common selectors probed, revoked keys, 1024-bit keys
- DMARC: policy, pct, alignment, and a nudge when p=none drags on
- Blacklists: 46 DNSBLs, on the domain and on the sending IPs
- The delisting link, right next to every listing
No false alarms
DNS has transient hiccups. We only alert after two consecutive failed checks, and we group alerts when everything breaks at once.
Alerts where you already are
Email, Slack, or a signed webhook. Clear subject, cause, impact, numbered fix, delisting link — our emails are our shop window.
DMARC reports you can read
One address to paste into your rua tag, and you finally see who sends in your name: volume, compliance, unaligned sources.
Frequently asked
Do I have to prove I own the domain? +
No. We only read public DNS records. Add a domain and the first check starts immediately.
How is this different from MxToolbox? +
MxToolbox hands you raw data. We tell you what is wrong, why it matters, and the steps that fix it — plus continuous monitoring that warns you before your recipients notice.
How long does setup take? +
Five minutes: one domain, one alert channel (email or Slack), and one address to paste into your DMARC record if you want the reports.
Do you do warmup or seed testing? +
No. Warmup is not our business. Inbox placement testing comes later — the monitoring has to be flawless first.
A check is a snapshot.
Things break while you are not looking.
Check your domain now, for free. Then let us keep an eye on it.