Master your

Analyze your deliverability: SPF, DKIM, DMARC, BIMI, TLS, blocklists, IP reputation, spam score, readability, Google/Yahoo compliance. 11 free tools + continuous monitoring.

Test now

Test your configuration

1 Send an email

Anti-bot check in progress…

2 Start analysis

Once your email is sent, you can start the analysis.

Waiting for your email…

(Please generate an address in step 1 first)

Advanced monitoring

Your DMARC & TLS-RPT reports, finally readable

Receive, parse and visualize reports sent by Gmail, Microsoft and Yahoo. Identify at a glance the authorized, suspicious or unknown sources sending on your behalf.

DMARC reports (RUA)

Receive and analyze aggregate reports from Gmail, Microsoft, Yahoo. Identify authorized and suspicious sending sources.

TLS reports (TLS-RPT, MTA-STS, DANE)

Collect TLS-RPT reports, validate your MTA-STS policy and verify DANE/TLSA records.

Identified sending sources

Visualize which IPs and domains send on your behalf: authorized, misaligned or suspicious. Strengthen your DMARC policy with confidence.

Monitoring & alerts

DNS scan every 48h on the free plan and every 12h from Pro, SSL monitoring, real-time alerts on DNS changes, RBL listings and expirations.

Identified senders, forwarders, threats

Every sending source is filed into one of those three categories. You see what to handle first, instead of reading XML.

SPF and DKIM alignment up front

Volume, DMARC compliance, SPF alignment and DKIM alignment at a glance, with how they move over time.

Where your email is sent from

A map of sending countries immediately reveals traffic from regions you do not operate in.

3 simple steps

How does it work?

Send an email, we handle the rest. Results in under a minute.

1

Send an email

A unique address is generated for you. Send an email from the server you want to test.

2

Automatic analysis

Over 20 checks run in parallel: authentication, DNS, blocklists, IP reputation, content, spam filters.

3

Detailed report

Get your score out of 100 with visual indicators, detailed results and actionable tips.

Use cases

Built for every email sender

Whether you send newsletters, transactional emails or manage client domains.

You fix things today. What about 3 months from now?

A misconfigured DNS record, a blocklisted IP, an expired certificate, it happens quietly and fast. With an account, you keep an eye on everything effortlessly.

Never lose your results

All your reports are stored and accessible. Track your configuration improvements over time.

Get alerted, not surprised

DNS monitoring, blocklists, records, we notify you as soon as a change is detected on your domains.

Nothing to pay, nothing to install

An email and a password is all it takes.

Want to understand what we check and why?

How it works

Everything that impacts your inbox

We check every critical point so your emails reach their destination.

Authentication & DNS

Security & Reputation

Content & Deliverability

Compliance & Monitoring

Browser extension

Analyse an email without leaving your inbox

The Sender Audit extension adds an analyse button to Gmail and Outlook. Authentication, sending IP reputation and spam score for the message you are reading.

Gmail Outlook
Free tools

11 free tools, no signup required

Check and generate your DNS records in a few clicks.

Teams and agencies

Many domains, many clients, one dashboard

Group your domains and IPs by client or by brand, invite your team with the right level of access, and route alerts where they belong.

Groups per client

One name, one filter. The dashboard narrows to a single client or brand.

Access roles

Owner, admin, billing or member. Billing stays separate from scan data.

Alerts to a shared mailbox

Notifications go to the address of your choice, not necessarily the account one.

Pricing

Free to start, paid when you scale

The free plan covers the full analysis and monitoring for your main domain. Pro adds the advanced analyses and heatmaps; Team and Business add DMARC monitoring across several domains, seed addresses and the API.

FAQ

Frequently asked questions

Over 40 checks: SPF, DKIM, DMARC, BIMI, DNSSEC, MX, TLS/STARTTLS, MTA-STS, IP & domain blocklists, spam score (SpamAssassin + Rspamd), readability, subject line quality, image accessibility, broken links, tracking pixels and Google/Yahoo bulk compliance.

Yes. The full analysis is free with no signup. A free account unlocks scan history, domain monitoring and real-time alerts.

Send an email to the unique address generated on our homepage. Within seconds, you receive a detailed report with a score out of 100 covering authentication, security, reputation, content quality and compliance.

Sender Audit offers 11 free tools: SPF Checker, SPF Generator, DKIM Checker, DMARC Checker, DMARC Generator, BIMI Checker, Blocklist Checker, Email Header Analyzer, TLS-RPT Checker, MTA-STS Checker and DNS Checker.

Yes. We check all requirements for bulk senders: DMARC authentication with alignment, List-Unsubscribe header with one-click support, proper SPF/DKIM setup, and low spam complaint rates.

With a free account, your domains are scanned every 48 hours, and every 12 hours from the Pro plan. You receive instant alerts when DNS records change, IPs get blocklisted, SSL certificates near expiry, or DMARC/TLS-RPT reports arrive.

Yes. Every analysis runs your message through SpamAssassin and Rspamd, the two engines used by a large share of receiving servers. The report details each rule triggered and its impact on the score, so you can fix it before sending.