Why am I receiving duplicate mail
I am receiving multiple copies of emails sent.
I have deleted old accounts and created new one
This did not help
I have tried to resolve my email duplicate problem by re-installing my Sierra OS.
This did not help
I have deleted my cookies
This did not help
Can someone who has felt with this solve this for a simple like me to resolve
Many thanks in advance.
iMac, iOS 12, 12.11.6. apple mail