Optimum Leads for Email Campaign

I'm seeking a reliable source to acquire leads of optonline.net users for an email marketing campaign.

Requirements:
- Leads should be exclusively optonline.net email addresses.
- No additional information needed, just the email addresses.

Ideal Skills and Experience:
- Experience in lead generation.
- Familiarity with optonline.net user base.
- Ability to deliver quality leads within budget and timeline.

Looking forward to your proposals!