Customers are getting multiple emails regarding draft orders.

[mwolfeu_pi3g]

Hello,

I am a developer working for a store and we have coded some tools to do things like create draft orders.  Just recently, some of our customers have received the draft order email up to 10 times.  I've read in other threads, that this can be related to shopify resends due to emails bouncing.   If this is true, is there a retry rate that I could set in shopify so our customers don't get spammed?  Alternatively, what is the best way to debug this?

As an example, one customer received 7 emails on Nov 3rd. between 9:46am - 11:38am CET.  

And just to confirm, all emails our customers receive regarding draft order creation is created by the shopify infrastructure and typically isn't configured to go through 3rd party servers, correct?

Thanks in advance,

Michael