Email Warmup Schedule Generator — Day-by-Day Ramp Plan

Generate a day-by-day warmup schedule for your cold email inboxes. See exactly how long it takes to reach full sending volume for Google Workspace and Outlook 365 — or skip warmup entirely with pre-warmed inboxes.

How Email Warmup Works

New inboxes have no sending history. ISPs like Gmail and Microsoft don't trust them yet. Warmup builds that trust by gradually increasing send volume over 2-3 weeks while generating positive engagement signals (opens, replies, moves to inbox).

Google Workspace Warmup Schedule

Target: 15 emails/inbox/day. Takes approximately 20 days to reach full volume.

  • Days 1-2: 2 emails/inbox/day — initial warmup
  • Days 3-4: 4 emails/inbox/day — building reputation
  • Days 5-7: 6 emails/inbox/day — building reputation
  • Days 8-10: 8 emails/inbox/day — ramping up
  • Days 11-13: 10 emails/inbox/day — ramping up
  • Days 14-16: 12 emails/inbox/day — near full volume
  • Days 17-19: 14 emails/inbox/day — near full volume
  • Day 20+: 15 emails/inbox/day — full volume

Outlook 365 Warmup Schedule

Target: 3 emails/inbox/day. Takes approximately 11 days to reach full volume.

  • Days 1-5: 1 email/inbox/day — initial warmup
  • Days 6-10: 2 emails/inbox/day — building reputation
  • Day 11+: 3 emails/inbox/day — full volume

Warmup Rules

  1. Send warmup emails only during the ramp period — not real cold outreach
  2. Stick to the schedule — don't skip days or jump ahead
  3. Send during business hours only (8am-6pm recipient time zone)
  4. Monitor bounce rates — stay under 3%
  5. Keep warmup running even after you start real outreach

Skip Warmup with Pre-Warmed Inboxes

Pre-warmed inboxes from Puzzle Inbox come with weeks of sending history already built up. Connect to your sending tool and start cold outreach at full volume on day one — no ramp needed.