IP Warmup (2)
How is IP warmup defined?
IP warmup or IP warming is the process of enabling an IP address to send required email volume. This is done by sending emails gradually over several weeks and months to highly engaged subscribers from the IP address in question.
When an IP is properly warmed it builds a good sending reputation with email box providers (Gmail, Yahoo, Outlook etc) and they are not suspicious of the IP address and do not rate limit when the IP sends high volume emails. Properly warmed IP addresses give better inbox rates.