Are old emails deleted if I remove an alias e-mail address and set up as a standalone e-mail account?

Are old emails deleted if I remove an alias e-mail address and set up as a standalone e-mail account?

Hi. I'm looking to remove an alias e-mail address and set it up as a standalone e-mail account. Will the old e-mail messages from the alias address remain in the old account (to which emails were delivered) or will they be deleted? Thanks in advance.