Send email on order status change to Backordered
 

I know a few people have answered this a couple of times, but all I can find is for 3x version, and I can't get it to work for 4x. We just want an email to get sent when the order status changes to Backordered, just as it does for Complete, and Processed. If anyone could tell me how to do this, I'd be greatly appreciative. Thank you.

Some of the mail functions are in include/func.php and they are close to line 2943 but I have no clue how to add backorder. Maybe from the code in func you can see where it is declared.

Thanks, I'll take a look. :)