IP Warmup
IP warmup is the process of slowly ramping up email volume on a new or unused IP address. Mailbox providers are cautious about new IPs with no sending history. Starting with low volumes to engaged recipients and gradually increasing builds the IP's reputation. Dedicated IPs require warmup, while shared IPs are already established.
IP Warmup vs Domain Warmup
Both are important but serve different purposes:
- ●IP warmup establishes the reputation of the sending server
- ●Domain warmup establishes the reputation of the sending brand
In modern email infrastructure, domain warmup is increasingly important because mailbox providers track domain reputation independently of IP. However, dedicated IPs still require their own warmup process to avoid being flagged as suspicious new senders.
Related Terms
Domain Warmup
The process of gradually increasing email volume on a new domain to build sender reputation.
Dedicated IP
An IP address used exclusively by one sender, giving full control over sending reputation.
IP Reputation
The trustworthiness score assigned to an IP address based on its email sending history.
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Transmit handles authentication, warmup, and reputation isolation automatically.