Blast sending vs staggered/throttled sending

Blast sending vs staggered/throttled sending

Same list, same copy — the sending schedule alone moves your placement.

Blast (all at once) Pros:
— Simple, hits everyone in the optimal window
— Less infrastructure to manage

Blast Cons:
— Spike pattern screams 'automation' to filters
— One mailbox can't safely absorb volume
— Reputation damage compounds fast

Staggered (throttled across mailboxes/time) Pros:
— Human-like drip, 20-40/mailbox/day
— Random intervals dodge pattern detection
— Isolates damage if one inbox dips

Staggered Cons:
— Needs more mailboxes and rotation logic
— Slower to clear a large list

Verdict: Staggered 4.5/5, blast 2.5/5 for cold.

Who it's for: Always throttle cold — cap each mailbox at 20-40/day, randomize gaps, and let Smartlead or Instantly rotate the load. Blasting only makes sense for warm, opted-in announcements from an established domain. The fastest way to kill a fresh domain is sending 500 cold emails on day one.