OpenERP 7 Based on this situation

"When a product of a particular type is sold, a reminder email is sent in two months to same customer urging a re-order"

Using Automated Action configure [Reminder email is sent in after two months to the customer]

Trigger Date Confirmation Date after 2 months

After Update Filter Condition Sale Order [('state','=','done')]

In Action Tab Multi Actions added

1) Action Type - Email 2) Action Type - Python Code

In Email action type configured customer email id and message

In Python Code action type code added to check particular product type

But email is not send based on particular product type. Currently its working in the way without checking the product type. How to combine action type Email and Python code and to send auto email only based on particular product type? or In base_action_rule module auto email how it works and which method to override based on particular product type?