Spam Checker for Cold Email in Gmail & Outlook by Inboxkit

Free spam checker for cold email. Scores every draft as you type and flags spam words, risky links and unfilled {{placeholders}}.

Inboxkit Spam Checker is a free spam checker for cold email. It checks your draft as you type in Gmail, Outlook or your sequencer, underlines the words and links that can send an email to spam, and gives the email a spam score from 0 to 10. Most spam checkers make you copy your email into a website. This one works inside the editor you already use, so you can fix a line before you hit send. WHAT IT CHECKS • Spam words: 240+ trigger words and phrases in 13 groups, including pressure and urgency, "free" offers, money promises, hype and cold email clichés. • Scam wording: prize claims, requests for bank or login details, and get-rich promises. • Links: too many links, and URL shorteners like bit.ly that spam filters distrust. • Placeholders: unfilled {{first_name}} variables in Gmail and Outlook, and broken ones like {{firstName} or [Company] anywhere. • Formatting: ALL CAPS words, repeated !! or $$$, images, and emails over 200 words. • Subject lines: spam words, fake Re: or Fwd:, too many emoji, and subjects over 60 characters. HOW TO USE IT 1. Start writing an email. A score badge appears in the corner of the editor. 2. Click the badge to see every issue, with a short reason and a suggested fix. 3. Click an issue to jump to it in your draft, then rewrite it and watch the score update. You can also paste any email into the extension popup to check it. WHERE IT WORKS It runs in Gmail and Outlook on the web, and in the email editor of the most-used cold email sequencers. On any other site, open the extension and click "Turn on". HOW THE SPAM SCORE WORKS Every email starts at 10. Each issue takes points off by severity, so you can see at a glance whether a draft is low, medium, high or very high risk. Quoted replies are ignored, so only the text you wrote is scored. PRIVATE BY DESIGN The spam checker runs entirely in your browser. Your emails are never sent to a server, stored or shared. No account or sign up needed. ABOUT INBOXKIT Content is one of three things spam filters check. The other two are authentication and sender reputation. Inboxkit sets up pre-warmed Google Workspace and Microsoft 365 mailboxes for cold email, with SPF, DKIM and DMARC done for you. More free deliverability tools: https://www.inboxkit.com/resources/tools