IP warming gradually increases sending volume to establish a good reputation for a new email IP. Learn when IP warming is needed and how to do it safely.
IP warming is the process of gradually increasing email sending volume from a new or previously inactive IP address to build sender reputation. Inbox providers watch sending patterns and engagement, and abrupt spikes from a new IP can trigger filtering or blocks.
A typical warm-up starts with small batches sent to highly engaged recipients, then expands volume steadily as performance remains healthy. Monitoring bounces, complaints, and engagement is critical during this period.
IP warming is most relevant for high-volume senders using dedicated IPs. Lower-volume senders often benefit more from reputable shared IP pools, where reputation is managed collectively by the provider.