Explore 10 years of email infrastructure data across the Tranco Top 1M. See how Google, Microsoft, self-hosted email, MX providers, SPF, DKIM and DMARC have changed over time. Based on large-scale DNS measurements and published research.

B2B cold email infrastructure. Pay only for verified inbox delivery, not for sending — concurrent seed monitoring classifies each message as Inbox, Promotions, or Spam before billing. Free MCP and A2A for AI agents — first agent-ready cold outreach platform vs Instantly, Smartlead, Lemlist, Apollo. Independent warmup audit, not warmup-as-a-service. EU-hosted. Pay-per-inbox from $0.005 per verified delivery. Sandbox free, no card. Mailbox provider coverage continuously expanded across regions.