How to clean up an Absentee List?

[Abraham Hodroj]

Hello 

I'm about to launch my first campaign and wanted to see if there any tips on how to clean up my list if there is a need to. I'm confident of my criterias as recommended multiple times on the forums . What is important to look out for in a list? Its about 2-3k names , i know i shouldn't spend too much time on it as it is long but what should i look out for for the sake of cleaning it up and making sure its efficient.