My sister bought my iPhone 7+ when I upgraded to the iPhone X, she is having a problem with handling her email. She mostly handles her email on the iPhone, but occasionally does it on her Hewlett Packard computer. When she went to use the email app on her computer (she has a Yahoo account) she found out that the computer has not been deleting the emails that she has deleted on her iPhone. My question is this: is there a way to tie the emails on both the iPhone and the computer together so an action on one will be also done on the other? Both her iphone and her computer have the latest version of their operating system on them.