Know the moment your email infrastructure changes — and exactly what to do
Email breaks silently: SPF quietly outgrows its lookup limit, DMARC slips to none, a sending IP lands on a blocklist. ToolTrusted continuously measures your email posture, remembers every change, and explains it in plain language — with the evidence and the fix. Independent, deterministic, and it can always show its work. Score any domain free in 30 seconds.
Agencies & MSPs: monitor every client domain in one place — and get alerted the moment one breaks, before your client notices.
After your scan: save it, track it, stay in the inbox
Your Email Health Check isn’t a one-off. Save it to a free Workspace and ToolTrusted keeps watch on your domain — no password, no spam. New to the result? See how to read your Email Health Score.
Save your report
Keep your Email Health Score and ranked fixes in a free Workspace — no need to re-run the same scan.
Open your Workspace →Track it over time
Every re-scan is saved, so you can watch your score climb as you ship each fix.
See your history →Free monitoring & alerts
We re-check your domain automatically and email you the moment SPF, DKIM, DMARC or reputation drift.
Turn on monitoring →Not a checker — a continuous intelligence platform
A one-off scan tells you today. ToolTrusted keeps watching, remembers everything, and turns every change into a clear, evidence-backed answer. This is the intelligence layer.
Continuous Monitoring
We re-check your posture on a schedule and catch drift the day it happens.
Timeline & History
A permanent, replayable record of exactly how your domain got here.
Trends & Analytics
MTTR, recurring and flapping issues, and a deterministic reliability verdict.
Incidents
Every issue as a coherent lifecycle — opened, resolved, with its own lessons.
Recommendations
The exact fixes, ranked by impact and explained in plain language.
Benchmarking
How your posture compares to a real 10,000-domain population.
Reports, Status & API
Scheduled reports, public status pages, and your posture as JSON on demand.
Portfolio & Automation
Every domain in one executive view; webhooks and Slack fire on every change.
Every verdict is measured, deterministic and explainable — the same inputs give the same answer, traceable to a rule and its evidence. We’re independent: we sell no ESP and no fix, so our verdicts have no agenda. See how the platform works →
Learn the email ecosystem
Guides, reviews and reference — the independent resources behind the platform.
Deliverability
Inbox placement, sender reputation, warm-up, spam filters, and blacklists.
Authentication
SPF, DKIM, DMARC, BIMI and MTA-STS — set up and troubleshooting.
SMTP Services
Amazon SES, Mailgun, SendGrid, Postmark and more — ranked on deliverability.
Email Marketing
Hands-on reviews, comparisons and best-of roundups of email platforms.
Verification
List cleaning, spam-score and inbox-placement testing tools.
Security
Stop spoofing and phishing; TLS, encryption and secure delivery.
Email APIs
Transactional and marketing APIs for developers — reviewed and compared.
Email Health Check
Score your domain out of 100 — plus free SPF, DKIM, DMARC & MX tools.
The State of Email Authentication 2026
We measured live DNS for the top 10,000 domains. SPF adoption is 84.5% and 76.6% publish DMARC — but only 54% actually enforce it. Read the full data, methodology and charts.
Read the study →In-depth reviews & guides
Every piece is based on real testing — not a rewritten feature list.
Brevo Review 2026
Our four-week test of the cheap all-rounder — pricing math, deliverability, and the verdict.
Read the review → Best Tools7 Best Mailchimp Alternatives
Free and paid, ranked by fit: Brevo, MailerLite, Kit, GetResponse and more.
Read the roundup → Best ToolsBest Email Marketing for Shopify
Seven tools compared for stores that need revenue-driving automation.
See the picks → GuideEmail Deliverability Guide 2026
SPF, DKIM, DMARC and a 30-day warm-up plan to stay out of the spam folder.
Read the guide → GuideMigrate Mailchimp to Brevo
A step-by-step move without losing contacts, automations, or deliverability.
Read the playbook → ComparisonGetResponse vs Mailchimp
The honest head-to-head — which one quietly costs bloggers hundreds more.
Read the comparison →Compare popular tools
Two tools, one clear answer for your use case.
Which wins for bloggers in 2026?
See the comparison → MailerLiteVSMailchimpSimpler and cheaper — or worth the upgrade?
See the comparison → ConvertKitVSKitSame tool? The 2026 rebrand, explained.
See the comparison →MailerLite vs Brevo — full feature matrix
The two best-value all-rounders, side by side. Scroll the table on mobile — the feature column stays put.
| Feature | MailerLitefrom $15/mo | Brevofrom $9/mo | Kit (ConvertKit)from $39/mo |
|---|---|---|---|
| Starting price | $15/mo | $9/mo | $39/mo |
| Free plan | Up to 250 subs | Unlimited contacts, 300 emails/day | Up to 10,000 subs |
| Best for | Tight budgets & clean design | Big lists, moderate send volume | Creators & newsletters |
| Automation | Good | Excellent | Excellent |
| Deliverability | Strong | Excellent | Strong |
| Our rating | ★ 4.6 | ★ 4.4 | ★ 4.5 |
| Try it | Visit site | Visit site | Visit site |
Why trust ToolTrusted
We measure only what’s real, our verdicts are deterministic, and every guide is grounded in the actual email standards — and we sell no ESP and no fix, so nothing is shaded for a payout. See exactly how we test, disclosed in full under the FTC’s Endorsement Guides.
Choosing an email marketing platform?
Tell us your list size, budget, and what matters most — get a tested pick in seconds.
Answer three quick questions — get a tested recommendation instantly.
Recommendations come from our hands-on testing and current pricing. Affiliate disclosure.
Free tells you your score. Premium runs your infrastructure.
Free is the checker that remembers — score, save and watch, at no cost. Premium unlocks the full intelligence layer: analytics, incidents, ranked recommendations, benchmarking, reports, an API, portfolio management and automation — so you operate, not just check.