E-Mail Hacking - Where Do I Start?

Hi there, I've been hitting wall after wall trying to figure out specifically how i'm going to hack an email account. I know i'll have to brute-force or dictionary attack or something like that in order to get the password, but how do I actually start hacking the email account.

FYI it's an old email most likely it's not being used.

how do I start "attacking" this email account so I can crack the password?

i'll highly appreciate a specific answer

• UCP