Imagine you've got a great email campaign lined up. You've planned out a sequence of personalized emails with strong subject lines and CTAs, you've got a list of interested leads, and you can't wait to get started. You hit send, then sit back and wait for the responses to roll in.

Except they don't. You hear nothing back. Zero replies, zero clicks and zero opens. How is that even possible?

Well, good, personalized emails and a relevant list are important, but none of that matters if your emails aren't being delivered in the first place. While several factors can affect your delivery rate, one of the most important is your sender reputation.

This is where email warm-up comes into play.

In this post, we'll take a closer look at exactly what it means, why it's so important, and the best ways to warm up your email address.