Will your cold email land in inbox or spam?

Inbox Shield is a free email deliverability checker built by ConnectLead Agency. Paste a cold outreach email and Inbox Shield scans it for spam trigger words, predicts whether it will land in Primary Inbox, Promotions, or Spam across Gmail, Outlook, and Apple Mail, and generates AI-powered rewrites to improve deliverability. No signup required, and your email content is never stored on our servers.

• Spam trigger word scanner with severity ratings and one-click safe replacements
• Inbox vs Promotions vs Spam placement probability across major mail providers
• Subject line score with AI-generated alternatives
• Readability, tone, CTA strength, and personalization audit
• AI copy rewriter with three optimization modes

Built by the team behind ConnectLead's outbound lead generation service. Read more B2B outreach guides in the Resources hub, or book a free pipeline audit to talk to the team.