Free tool
Cold email spam word and link checker
Paste the subject and body of a cold email. 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It does not produce a spam score: mailbox providers do not publish one, and a number would hide what to change.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
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 rather than disguising the word. Swapping letters for symbols makes it worse.
FAQ
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.