I'm looking for a way to have documents saved under an account, be grabbed and sent to an email address once a specific status has been updated. 

For example we have a tab we've labeled as sales orders, when the status is changed to shipped, it emails the customer the tracking number and estimated delivery date.  I'd like it to also grab pdf docs (COA, BOL, etc) from that order and send in that email.  

Currently we have to go into zoho change the status to shipped, then email all the docs to the customer.  It would be nice to combine to the two.  

Any ideas or suggestions?