When you start sending emails from a new IP address or domain, ISPs are cautious about the sender's legitimacy. A sudden spike in email volume can trigger spam filters and result in poor deliverability. Gradual warm up helps you avoid these pitfalls by:
Building Trust: ISPs see consistent and increasing email activity as a sign of a legitimate sender. Improving Deliverability: By starting slow, you can monitor and adjust your strategy to ensure emails land in the inbox. Avoiding Blacklists: High-volume sending from a new IP can get you blacklisted; gradual warm up mitigates this risk.