IP warm-up is the practice of gradually increasing the volume of email sent from a new IP address so mailbox providers can build trust in it over time. Sending too much, too soon from a cold IP looks suspicious and gets throttled or filtered, so warming up protects deliverability from the start.
How IP warm-up works
You start with small volumes to your most engaged contacts and raise the amount over days or weeks, letting providers see consistent, wanted mail. It matters most on a dedicated IP, where the reputation is entirely your own. Mailpro handles warm-up as part of its IP reputation management.
Why it matters
Skipping warm-up is one of the fastest ways to damage a new IP's reputation and land in spam. A careful ramp builds a lasting foundation for the inbox. Learn more in how IP reputation affects delivery. Related: sender reputation and deliverability.
Mailpro and deliverability
Warm up new IPs without the guesswork
Mailpro ramps and monitors new sending IPs for you, so a fresh IP reaches full volume safely.