Private cold email infrastructure with managed deliverability. Customers buy mailboxes on our own infrastructure, and we take responsibility for landing them in the inbox: a private warmup pool tuned to each inbox provider, biweekly inbox placement tests and pre-warmed mailboxes. Highlights: ✅ $368k ARR (MRR $30.6k, +61% YoY), 96% recurring ✅ 70% gross margin; $84k TTM EBITDA before founder salaries ✅ 88 paying customers in 34 countries, 13,000+ live mailboxes ✅ Run by a CTO and 3 engineers Growth so far comes from cold email and referrals alone. SEO, ads, partnerships and Google mailbox resale are untapped. Ideal for an AI SDR platform, sales tool or GTM agency that wants to own its sending layer.