Again, you are misstating this. It's more like you are claiming that Walgreens sent me an email saying they sold me Heroin.
First of all I could safely deny it based on having searched my email and also not being involved in anything relating to Heroin. Then, were there money on the line I could get independent verification that there was no such email evident in my inbox. Since I am nobody of any significance, that is all I could do. Were I Biden though, I could get Walgreen to confirm that they hadn't sent the email. They would almost certainly have their email logged in an auditable way so we could get proof one way or the other. Were I Biden I would also be able to get Apple to confirm if the email had been received.