AcuityScan

Email Health Check

Full email deliverability audit — SPF, DKIM, DMARC, MX records, reverse DNS, MTA-STS, 80+ blacklists, SMTP test, and Google/Yahoo 2024 sender compliance. Find out why your emails are going to spam.

SPF / DKIM / DMARC80+ blacklistsSMTP testGoogle/Yahoo compliance

What you get

Example

A complete email deliverability audit — here's what we check.

SPF RecordPass
v=spf1 include:_spf.google.com ~all

Verifies which servers can send email for your domain

DKIM SignaturesPass
selector1, selector2 found

Checks 16 common selectors for cryptographic email signing

DMARC PolicyReject (strongest)
v=DMARC1; p=reject; rua=mailto:...

Checks policy strength, reporting addresses, alignment

BlacklistsClean
0/82 — not listed on any

Scans your mail server IP against 80+ active blacklists

SMTP TestConnected
Port 25 responding, STARTTLS supported

Actually connects to your mail server and tests the SMTP conversation

Google/Yahoo ComplianceCompliant
SPF ✓ DKIM ✓ DMARC ✓ PTR ✓

Validates against the 2024 bulk sender requirements

Why emails go to spam

Missing SPF record

Without SPF, email providers can't verify your server is authorized to send for your domain. Gmail and Outlook will flag your emails as suspicious.

No DKIM signing

DKIM cryptographically signs your emails. Without it, providers can't verify the email wasn't tampered with in transit. Required by Google since 2024.

Weak DMARC policy

DMARC tells providers what to do with failed emails. 'none' means anyone can spoof your domain. 'reject' is the strongest protection.

Blacklisted IP

If your mail server's IP is on a blacklist (Spamhaus, Barracuda, SpamCop, etc.), your emails get rejected before they're even read.

No reverse DNS

Mail servers without PTR records look like spam bots. Most providers check reverse DNS and reject mail from IPs without it.

No STARTTLS

Modern email should be encrypted in transit. If your server doesn't support STARTTLS, some providers will downgrade your reputation.

Common questions

Why are my emails going to spam?
The most common reasons: missing or misconfigured SPF/DKIM/DMARC records, your IP is on a blacklist, no reverse DNS, or your content triggers spam filters. This tool checks all of these.
What are Google's 2024 sender requirements?
Since February 2024, Google and Yahoo require bulk senders to have: SPF AND DKIM configured, a DMARC record (any policy), valid reverse DNS on sending IPs, and a one-click unsubscribe for marketing emails. Failing these means your emails go to spam.
How many blacklists do you check?
80+ verified active blacklists including Spamhaus (ZEN, SBL, XBL, PBL, DBL), SpamCop, Barracuda, Abusix, SORBS, SURBL, URIBL, and many more. We check both IP-based and domain-based blacklists.
What's the difference between SPF, DKIM, and DMARC?
SPF defines which servers can send email for your domain. DKIM adds a cryptographic signature to prove the email wasn't altered. DMARC ties them together and tells providers what to do when checks fail. You need all three.

Related tools

Blacklist Check SMTP Test SPF Generator DMARC Generator

Want the full picture?

The checks email plus 7 other categories — DNS, SSL, performance, SEO, accessibility, privacy, and mobile.

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