Free Email Template Checker.
Test a cold email for spam before your prospects see it: a score out of 100, a real spam filter score and a fix for every issue.
What we check
Every Part A Spam Filter Reads
Each check comes back failed, warning or passed, with why it matters and how to fix it.
Subject Line
What the recipient and the filter see first.
- Length and spacing
- Capitals, punctuation and emoji
- Fake Re: or Fwd: prefixes
- Spam-trigger phrases
Body Copy
The copy itself, read the way a filter reads it.
- Length and format
- Capitals and exclamation marks
- Money and prices
- Disguised words like fr3e
Spam-trigger Phrases
610 phrases in a maintained list, each flagged with a suggested replacement.
- Urgency and pressure
- Money and over-promises
- Shady and medical wording
- Subject and body
Links
Where every link goes, and whether it says so.
- Link shorteners and redirects
- Links to bare IP addresses
- Text that hides the destination
- Insecure or broken links
Images
Images that read as a flyer rather than a note.
- Text versus images
- Missing alt text
- Embedded images
- Tracking pixels
HTML
Markup that filters penalise or mail clients break.
- Size and structure
- Scripts, forms and embeds
- Hidden text and comments
- Plain-text version
Compliance
The parts that make a cold email legitimate.
- From name and address
- Reply-To
- Opt-out
- Attachments
Personalization
The merge tags that turn one email into many.
- Merge fields that will not fill
- Broken spintax
How the score works
One Number You Can Act On
Every email starts at 100. Each failed check takes off the most points, a warning takes off fewer, and a passed check costs nothing. The spam filter score is folded in, so a message the filter would flag cannot grade better than Fair however clean the rest of it looks.
90 and above is Excellent, 75 and above is Good, 50 and above is Fair, and anything lower is Poor. An email is ready to send when nothing fails and its spam filter score is under the threshold. Fix the failed checks first: they cost the most, and they are usually what a filter notices.
Six Habits Of Emails That Read Well To Filters
- 01Write It Like A Note, Not A FlyerShort paragraphs, plain words and one clear ask. Heavy formatting, big images and several buttons read as marketing mail, and filters treat them that way.
- 02Keep Links Few And HonestOne or two links to your own domain is plenty. Link shorteners, bare IP addresses and link text that hides where it goes are classic phishing signals.
- 03Drop The Pressure WordsPhrases like “act now”, “100% free” or “risk-free” are what spam filters were trained on. Say what you offer in specific, ordinary language instead.
- 04Send From A Real Person On Your Own DomainA named sender on an authenticated domain gets more replies and fewer complaints than a no-reply, role or free-mail address.
- 05Check The Merge FieldsA {{first_name}} that never fills, or broken spintax, tells the recipient it was a template. Test with the fields your contacts actually have.
- 06Give People A Way OutA simple opt-out line keeps complaints down, and complaints hurt your domain far more than an unsubscribe ever will.
Template Checker Questions
How to use it, how the score works and what happens to your message.
Paste your subject and message as plain text or HTML, or upload an .eml file exported from your mail client, then press Analyze. Adding your From name and address is optional, but it lets the checker review the sender too. Results appear in a few seconds.
Improve Your Template’s Deliverability.
Check every step of every sequence, keep a history of results and let SpirenAI draft the fixes.
14-day free trial. No card required.