Is it possible to finds somebody's gamer tag through there email address?

No. The system is designed to only do a search by the Gamertag only. The sign in email address for the account is not searchable. It's also a security feature so no one but you, the account owner, knows the sign in email address for the account.

Good evening,

Just to make sure we are clear

1) Old email with gamer tag I want

2) Current email with gamer tag I don’t want

I want to move the gamer tag I want from the old email address to my current email address. If possible, to delete my new gamer tag I don’t want

Is the steps you mentioned still correct?

Hiya, it's not possible to have two gamer tags associated with the same email. You can have billing info going to the same address but not the account itself. Here is a page that will help you find the email address.

support.xbox.com/.../forgot-microsoft-account

1st question is this was support able to find your account with your gamertag that you had on that account? If so that means the account is still open and possibly you are misspelling the email address with one that the system is not able to find. hence
its giving you that message.

if support was not able to find an account for you with your gamer tag then yes its possible that it was closed due to inactivity.

now if support was able to find an account for you and they can verify that account ownership then they would be able to get into the account enough to tell you what the email address is for the account.

first of all you can not have 2 different gamer tags on one email address so there must be a different email address associated with the original gamer tag your best bet would be to contact xbox support at support.xbox.com/contact-us and give them your gamer
tag and if they can verify your account they can give you the email address associated with your original gamer tag