In sales, email outreach is not just about contacting leads via email. This is a complex of stages you need to go through from the beginning to the end.
Challenge 1: Targeting the right people
You can't target everyone as this will lead to wasted resources and no revenue. Instead, having a clear customer profile in mind will let you narrow down your targeting to only those people who will most likely buy your product. So you'll be able to personalize your emails accordingly.