Delta and EarthLink have expanded a marketing agreement that allows SkyMiles members to earn miles for subscribing to EarthLink’s Internet services.

Under the expanded agreement, SkyMiles members can earn 7,000 bonus miles for new subscriptions to Internet services from EarthLink such as dial-up, high-speed DSL or cable service. Members who sign up for new service by March 31 will receive an additional 3,000 miles, for a total of 10,000 miles.

The offers are one-time bonuses and available only to new EarthLink customers. Bonus miles will be earned when customers have an active EarthLink account for a minimum of 30 days.