Free tool
Cold email spam word and link checker
Paste the subject and body of a cold email.
About this tool
About the cold email copy checker
The checker flags links and bare domains (mail clients turn example.com into a link), images, spam-trigger phrases, fake Re: or Fwd: subjects, long emails, long sentences and missing questions, and says why each one matters.
It does not produce a spam score: mailbox providers do not publish one, and a number would hide what to change.
How it works
How to read the result
Every flag has a level. Error: fix it before you send. Warning: fix it unless you have a reason to keep it. Note: read it and decide. The four counts above the list are words before the signature, links and domains, the longest sentence and the subject length.
- Links and bare domains: an error in a first email and a warning in follow-ups; delete the link and the website in the signature and send them after a reply (what links and open tracking cost)
- Images and HTML: an image, logo or tracking pixel is an error and other formatting tags are a warning; send the email as plain text
- Spam-trigger phrases: money and offers, urgency and pressure, hype and marketing phrasing are warnings; rewrite the sentence around a fact the reader can check (what spam filters check besides words)
- Generic openers such as "I hope this email finds you well" or "my name is" are notes: the first line shows in the inbox preview, so open with the reason you are writing
- Subject line: a fake Re: or Fwd: on a first email is an error; more than 60 characters, words in capitals, exclamation marks and emoji are warnings
- Length: over 90 words before the signature is a warning and over 125 an error; a sentence over 28 words, no question or more than two questions are warnings; cut to one point and one question
- Formatting: words in capitals, long dashes and one unbroken block of text are notes; split the email into 2 to 4 short paragraphs so it reads on a phone
- Prices, attachments and merge variables: a price or discount and an email with no merge variables are notes, a mentioned attachment is a warning; offer files and prices after a reply
- Nothing flagged: send a test to a mailbox you own and read it on a phone; for a review with a rewrite, run the copy reviewer skill, and the link checker skill on copy and signatures
Background
Why links are the first thing to remove
A link in a first email from an unknown sender is one of the strongest spam signals, and a bare domain in the signature counts as a link once the mail client makes it clickable. Keep the signature to your name and title and send links after the person replies.
Background
Trigger words are a symptom
Filters look at much more than words. A list of trigger phrases is still useful as a proxy: money language, urgency and hype are what marketing email sounds like, and a cold email that sounds like marketing gets treated like it.
Rewrite the sentence. Disguising the word by swapping letters for symbols makes it worse.
Free guide19 min read
Send 100,000 cold emails a month
Domains and mailboxes you need, DNS, warm-up, lists, copy and follow-ups, with a launch checklist, sent to your inbox.
Questions
Should cold emails contain links?
Not the first one. Send links after a reply. That includes your website in the signature, because mail clients turn bare domains into links.
How long should a cold email be?
50 to 90 words before the signature is a good range: one reason you are writing, one relevant fact and one question.
Do spam trigger words still matter?
Less than sender reputation, links and recipient engagement, but money language, urgency and hype still mark an email as promotional.
Is the copy I paste stored?
No. The checks run in your browser and nothing is sent to our servers.
In your AI assistant
Run the same checks in Claude or ChatGPT
Free SKILL.md files with the rules behind this tool. Install them in Claude or Claude Code, or paste them into ChatGPT, Gemini, Grok or Cursor.
Mailboxes, warm-up and sending in one place
$2.50 a mailbox a month. DNS records are set for you, and every mailbox shows its warm-up numbers from day one.
Deliverability call
Talk to our deliverability team
Book a call with the people who run our mailbox infrastructure. We look at your current setup and tell you what to change.
- Review your domains, DNS records and current inbox placement
- Size the setup: domains, mailboxes per domain and daily volume per mailbox
- Plan warm-up and the move from your current provider or sequencer
Free call
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