Monthly time tracking

[Jannik Ackermand]

Hi,

I would like to implement a solution where I can track time each month for each issue in a board. That being said, I need the time to be reported from an external part that is not inside my JIRA project. The ideal setup would be: At the end of each month an email goes out to the contact person in the issue (external person) --> they report the time (is there an app for this?) --> the hours for each month is collected in the issue. 

Has anyone done something like this before? Any help would be greatly appreciated. 

Thanks!

Jannik