I'm not sure which Stack Exchange site I should use for this GMail/Yahoo! mail security question:
Let's say I have a GMail or Yahoo! account and another person knows my password. (I had to tell him the password because both of us are using the same account for a common purpose.)
Now, is there are way, like some paid service of Yahoo! or GMail or whatever, that tells you right away when the password was changed by that other person? For example, it could send e-mails to your alternative e-mail addresses when you change the password.
But, what if the other person logs in, deletes my alternate e-mail addresses and changes the password one day, and I am unable to log in to that account? I'll be screwed.
So how do I make sure that I never lose access to my e-mail accounts? Is there any paid service for this purpose? I have been Googling, but it has been in vain.