One bad AI cold-email campaign can knock 50% off your whole company's email deliverability — across every domain you own. Here's the part no AI SDR vendor brings up at renewal: In November 2025, Google stopped spam-filtering non-compliant bulk email and started rejecting it outright. Microsoft's enforcement landed in May 2025. The bar now: SPF, DKIM and DMARC all aligned, spam complaints under 0.3%, one-click unsubscribe above 5,000 sends a day. Cross that 0.3% complaint line once and the damage hits every mailbox in the company. Not just outbound. Support replies, board updates, the investor email your CEO sends Friday. Recovery runs 3–12 months. The trap: most autonomous AI SDR tools run their own sending infrastructure, so you have zero visibility into your domain reputation until it's already burned. It's the same reason the category is unraveling — 11x.ai lost 70–80% of its customers within months, and AI SDR platforms now churn at 50–70% a year, roughly double the human reps they were sold to replace. Volume was always the wrong objective. Quality-per-email is the only strategy that survives the new deliverability rules. What we build instead: custom sales AI trained on your top performers' actual writing, inside your existing CRM, with deliverability engineered from day one — and measured on cost per held meeting, not sends. Why "held," not "booked": a $100 booked meeting that only shows 65% of the time really cost you $154 — and AI-booked meetings show up 10–15 points less often than human-booked ones. That gap is invisible if you only count sends. RevOps and outbound leaders: does your current AI SDR tool even tell you its spam-complaint rate? Save this before your next eval — and if you've ever had a domain go cold, what brought it back? #AISDR #ColdEmail #RevOps #B2BSales #EmailDeliverability