Free spam tester
Check your email for spam words
Paste your text or HTML, or drop an .eml file. You get a spam risk score, every trigger word highlighted and the formatting issues filters flag, before you hit send.
- Runs in your browser
- Text, HTML or .eml
- English and French
- No sign-up
Your email
Checked in your browser. Nothing is uploaded.
Your spam score shows up here
Paste an email or drop a file. The score updates as you type.
What it looks for
Five kinds of trigger words, plus the formatting filters hate.
Nearly 200 English and French phrases, each weighted by how strongly filters react to it. Common words like “free” only count when they pile up.
Shady
Phishing, scam and adult vocabulary. Rewrite these first.
- verify your account
- confirm your account
- account suspended
- social security number
Money
Cash, prizes and income claims, the oldest spam topic.
- free money
- fast cash
- easy money
- make money fast
Too good to be true
Guarantees and miracle results nobody can back up.
- 100% guaranteed
- miracle
- once in a lifetime
- no catch
Urgency
Countdown pressure that filters learned from years of scam blasts.
- act now
- act immediately
- urgent response
- final notice
Hard sell
Stacked sales calls to action and discount language.
- buy now
- order now
- call now
- apply now
Formatting signals
- Words in ALL CAPS
- Stacked marks like “!!!”
- Shortened or raw IP links
- Link text showing another domain
- Image-only layouts
- No unsubscribe link
- Scripts, forms and iframes
Is my email uploaded anywhere?
No. The spam tester runs entirely in your browser. Pasted text and dropped files are read on your device and never sent to Lumail or anyone else.
How is this different from the mail tester?
The spam tester reads the words and formatting you paste, before you send. The Lumail mail tester receives a real email from your sending tool and also checks SPF, DKIM, DMARC, blocklists and broken links, with a score out of 10.
Will one spam word send my email to spam?
No. Gmail, Outlook and Yahoo weigh your sending reputation, domain authentication (SPF, DKIM, DMARC) and how readers engage far more than any single word. Trigger words matter when they pile up, especially in the subject line and next to other signals like capitals, shortened links or image-only layouts.
How is the score calculated?
Each trigger word has a weight from 1 to 3. Repeats add less than the first use, and words in the subject line count 1.5×. Formatting checks add points on top: capitals, stacked exclamation marks, hidden link destinations, image-heavy layouts, a missing unsubscribe link and scripts or forms. Under 20 is low risk, 20 to 49 is medium, 50 and up is high.
How do I get an .eml file of my email?
Send yourself a test. In Gmail, open it, choose Show original, then Download original. In Apple Mail, choose File, then Save As, with Raw Message Source. In Outlook or Thunderbird, save or drag the message out as .eml. You can also paste the HTML from your email editor, or the raw source.
Does it work for emails in French?
Yes. The list covers English and the most common French triggers, like “gratuit”, “offre limitée”, “cliquez ici” and “satisfait ou remboursé”.
My score is low. Will I land in the inbox?
A low score means your copy isn’t the problem. Inbox placement still depends on an authenticated domain, a list of people who asked to hear from you and a one-click unsubscribe. Lumail sets up SPF and DKIM with your domain and adds the List-Unsubscribe header to every campaign.
Import your list. Send tonight.
3,000 emails a month on the free plan, no card.