Sending mail to SAP Inbox thru actions

Hi Friends,

I am having a requirement as below:

Need to send one mail to SAP Inbox to the BP in one specific partner functions in an activity based upon the below conditions:

1) Status of the transaction is open

2) The Todays' Date -Created date =45

I believe this can be done using actions. Please let me know if this is possible. If yes let me know the simplest way and if know let me know the alternative way.

Thanks,

Jai