... built my own tool. For context: I was running cold email campaigns across 4 mailboxes. Every warmup service I tried charged $29/mailbox/month. That's $116/mo before sending a single email. So I spent 2 weeks building WarmInbox. It does the same thing the big tools do: Connects to any mailbox

... forever. Then they wonder why their open rates dropped from 30% to 8%. The reality is: verify before every major campaign, not once a year. What we built differently with ClearBounce: 99.9% accuracy with multi-layer verification (syntax, DNS, MX, mailbox-level checks) Risk scoring that goes beyond valid/invalid we flag the risky gray zone Real-time API + bulk verification for lists of any size Built-in integrations with Mailchimp and more coming We're live at clearbounce.net would love ...