Bulk Earthlink.net Emails for Newsletter Campaign

I'm in need of a pre-existing, bulk Earthlink.net email list. I work for an email marketing company and we're looking to widen our audience reach. The primary use for this email list will be for sending out newsletters.

Ideal Skills and Experience:
- Experience in email marketing
- Familiarity with data sourcing for email lists
- Knowledge in newsletter content creation (not mandatory but a plus)