Help with my account

Well as the title says, I am playing TBC and Wotlk with my own account, the doubt I have is, If it is possible to be able to change my email and have 2 emails for my account, so that they understand me better, I want my Account in TBC was separated from Wotlk, I do not know if it is possible to do it, since the truth would like to be able to do that, I expect a prompt response, and THANK YOU! : D

only way to have 2 emails would be having 2 separate accounts with different login details.

If that I know, but I want my account to be divided into 2, to have an account in TBC and the other in WTLK, but with my current characters ... :(