Newsletter subscription product with duration

[mibe-dt]

Hello,

I am looking for a way to create 3 Newsletter subscription products in joomla 2.5

• 3 Months without extension
• 3 Months Subscription with automatic extension
• 12 Months Subscription without extension

Is there a way to combine the Virtuemart users with (e.g acymail) to auto subscribe them for a Newsletter subscription and unsubscribe them after the 3/6 month period?
As it is now, I would need an extern list with all the customers and order dates and check it every day to see which customer needs to be disabled.

thanks for the advise

michael