PLAYBOOK: Warm a cold sending domain the right way over 21 days.

PLAYBOOK: Warm a cold sending domain the right way over 21 days.
Per multiple deliverability folks we trust, the rush is what kills new domains. Pace it.
— Days 1-3: send 20-30/day to your most engaged, replied-before contacts only
— Set SPF, DKIM, DMARC live before send one — not after the first bounce
— Double every 2-3 days, never per day, and never to a purchased list
— Watch Postmaster Tools: keep spam rate under 0.1% or pause and hold
— Seed 5% to Gmail, Outlook and Yahoo test boxes daily to catch folder placement
The teams that warm in a week burn the domain by week three. Watch this.