Bulk Email List for Marketing Campaign

I'm looking for a bulk email list containing over 300k addresses from earthlink.net, cox.net, and bigbond.net. The primary purpose for acquiring this list is to send out weekly email newsletters as part of a marketing campaign.

Ideal Skills:
- Data sourcing
- Email marketing expertise
- Understanding of data privacy laws

Please ensure the lists are compliant with email marketing regulations to avoid deliverability issues.