https://github.com/frappe/erpnext/pull/13217
Please have a look at it and test it.
is it possble to add it on erpnext hosted server
Dear i dont think that email is working anymore. I have tries sending email before it used to return support ticket and someone would reply on that but now no one does
Would be best to connect with them over the support or sales address and request for an upgrade to v11