Marketers say segmentation/targeting and list growth are their top email challenges, according to recent research from Clutch.

The report was based on data from a survey of 303 respondents who describe themselves as expert, advanced, or intermediate email marketers. All respondents work for companies with 100 or more employees (31% B2B, 69% B2C).

Tracking results ranks as marketers' third biggest email challenge (respondents were asked to pick their top three issues).

Personalization ranks fourth, followed by developing a strategy and retaining subscribers.