Email warm-up

Providers judge senders by history. A new domain or IP that suddenly sends thousands of messages looks like a spammer starting a run. Starting small, with recipients who expect and engage with your mail, and growing volume steadily over a few weeks builds the record that keeps mail in the inbox.

Ordinary person-to-person email from a new domain warms up naturally, provided volume stays human-sized at first. Bulk and marketing mail is where a deliberate ramp matters most.