Email Warmup

A new mailbox has no reputation. Mailbox providers treat unknown senders with suspicion, and a new address sending 300 emails on day one confirms that suspicion. Warmup builds a track record by ramping volume slowly enough to look like a person who started using a new work address.

The cost of skipping it is not a slow start. It's a domain that never reaches inboxes and has to be replaced.

The schedule

Day 1-3       10-15/day        Ramp begins
Day 4-7       +5/day           ~20-30 by end of week 1
Week 2        30-50/day
Week 3        50-80/day
Week 4        80-120/day
Week 5+       120-150/day      Ceiling for cold outbound

The three parameters that define it: