I skipped warmup and lost 20 inboxes in one week. Learn from my mistake

warmup_skip_regret · 2026-04-03 · 2,560 views

This is a cautionary tale for anyone thinking about skipping warmup to save time. I tried it. It cost me $200 and 2 weeks of zero pipeline.

I bought 20 standard Google Workspace inboxes from a budget provider. Not pre-warmed. Fresh accounts with zero sending history. I was impatient and wanted to start generating pipeline immediately, so I connected them to Instantly and started sending cold email on day 1 at 15 emails per inbox per day.

Day 1 to 2: Everything seemed fine. Emails were going out. A few replies trickled in. I thought I'd gotten away with it.

Day 3: Half my inboxes were landing in spam. I ran a GlockApps test and inbox placement was at 31%. The fresh accounts had no sending reputation and Google's filters were flagging the sudden volume spike.

Day 5: 8 inboxes got temporary sending restrictions from Google. I couldn't send from them at all. My daily volume dropped from 300 to 120.

Day 7: 12 inboxes were fully suspended. Google flagged them for suspicious sending patterns. The accounts were effectively dead. And because the domains were associated with suspended accounts, those domains were compromised too.

Total damage: 12 suspended inboxes (unrecoverable), 5 compromised domains, $200 lost in inbox and domain costs, plus 2 full weeks of zero pipeline while I rebuilt everything from scratch.

What I should have done: bought 20 pre-warmed inboxes from PuzzleInbox for about $90. They would have arrived with 14+ days of warmup already completed, DNS fully configured, and ready to send from day one. I would have saved money AND started generating pipeline 2 weeks sooner.

Warmup exists for a reason. Fresh inboxes have no reputation. Email providers treat sudden volume from unknown accounts as suspicious. Pre-warmed inboxes from a provider like PuzzleInbox have established sending patterns that email providers trust. Don't skip warmup. Just don't.