I worked in digital marketing agencies and this is a usual ask of clients.
There are a few questions that you need to ask prior to this.
1. Who is your target segment (s) and where do they play / live
2. What outcome do you want from engaging with persons from this list
3. If it is B2B, are there professional bodies you can partner with
4. How qualified does this list need to be / How do you intend to qualify the list
Let's talk more for me understand where you are coming for so that we can talk strategy that makes sense for you.
