When I created my email account I decided to use as the primary email: email@example.com
and then I created an alias as: firstname.lastname@example.org . Now I regret it, and I would like to make email@example.com the primary email on my account , and firstname.lastname@example.org can now become the alias so I don't lose any messages than may still be sent to the second one.
I found an article that talks about how to swap them but it won't let me.
How can I go about swapping them , without losing all the emails and information in my mailbox ?