There's a myth that the bigger your email database is, the more successful your email marketing will be.

In truth, a large list can be cumbersome, and it can lead to irrelevant and ineffective campaigns.

The solution to the problem is good segmentation. By parsing your list well and focusing on the segments that really matter, you can boost relevance and effectiveness.

So, which are the ones that really matter? An infographic (below) from GetResponse covers the key segments that you should concentrate your efforts on.