Know the Minute Your Deliverability Breaks

Deliverability failures are silent: DNS edits break SPF, migrations kill DKIM, and blacklists never notify you. Truelist watches everything that decides inbox vs spam — and alerts you the moment something changes.

shield Authentication, actually parsed.: Your SPF, DKIM, and DMARC records are checked continuously — and evaluated, not just found. Config drift gets caught the day it happens, not the quarter after.
visibility Blacklist watch on your sending IPs.: Blacklists don't email you when they list you. We monitor your sending IPs against the lists mail providers actually consult, around the clock.
notifications_active Alerts with the fix included.: Every alert names the record, what changed, and what to change back — plain language, not raw DNS output. Weeks of silent damage becomes a same-morning fix.

app.truelist.io/deliverability

acme.com Monitored

SPF Valid — 3 includes, under lookup limit
DKIM Both selectors resolving
DMARC p=quarantine, reports flowing
Sending IPs 4 monitored — all blacklists clear

Alert (resolved): DKIM selector 2 stopped resolving — notified 09:14, fixed 09:41

Deliverability doesn't announce its failures

Every deliverability disaster we see follows the same script: something changed silently, and the sender found out weeks later.

swap_horiz ESP migrations break DKIM: You switch email providers, the old selectors stop resolving, and nothing beeps. Your authentication quietly fails on every send until someone notices open rates cratering.
edit DNS edits break SPF: Someone on the team adds a tool, edits the TXT record, and pushes your SPF over the 10-lookup limit — or deletes an include that mattered. It breaks on a Tuesday; you find out next month.
gpp_bad Blacklists strike silently: A sending IP lands on a blocklist and the blocklist does not send you a letter. Every email you send afterward pays the price while you troubleshoot everything else first.
support_agent Discovery by customer: The usual monitoring system is a customer asking "did you stop sending your newsletter?" By then the reputation damage has been compounding for weeks.

Start verifying for free View pricing

Set up once, watched forever

Monitoring starts in minutes and runs in the background permanently.

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Step 1

Add your domains and IPs

Point Truelist at the domains you send from and the IPs you send through. Domain limits scale with your plan.

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Step 2

We baseline your setup

SPF, DKIM, and DMARC are parsed and evaluated, and your IPs are checked against major blacklists — so we know exactly what "healthy" looks like for you.

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Step 3

You hear about changes first

The moment a record drifts or a listing appears, you get an alert with the specific fix — before your recipients notice anything.

Truelist alert

acme.com · 9:14 AM

Action needed

SPF broke on acme.com — a required include was removed

What changed

include:_spf.mail-sender.com

Removed from your TXT record at 9:02 AM. Mail sent through this provider now fails SPF.

The fix

v=spf1 include:_spf.google.com include:_spf.mail-sender.com ~all

Restore the include, or remove the provider from your sending setup.

Frequently asked questions

How is this different from the free domain reputation checker?: The free checker is a snapshot — great for "am I OK right now?" Monitoring is continuous: it catches the change you didn't know happened and alerts you, instead of waiting for you to remember to check.
Which blacklists do you monitor?: The major lists mail providers actually consult when scoring senders — the same detection stack we run for our own sending infrastructure.
Is deliverability monitoring free?: It's included with every paid Truelist plan, with domain limits that scale by tier. Our free snapshot tools stay free; continuous monitoring is part of the paid product.
Do you fix issues or just alert me?: Alerts come with specific, plain-language fixes — which record, what's wrong, what to change. For blacklist listings, we point you at the right delisting process.