There are a few reasons that you may not receive a system email after attempting a password reset, account migration, or another system operation:
You have not verified your email address
Click here to have the Mojang account email verification re-sent. If you are already verified, another email will not be sent.
The email went to your junk mail folder
Please check your junk mail to see if your email is there.
You have previously marked emails from Mojang as spam
If a customer marks a Mojang email as spam, our mail service does not allow us to send future messages to that account. Customer support can check to see if there has been a spam complaint from your email address, and reverse it.
You have re-opened a previously closed email
If our mail service has marked your account as closed, we can indicate that it is okay to send email to that address again.
You have a typo in your email
If you have a simple and obvious formatting error (i.e. ,com or .cmo), we can change that for you without verification. If you misspelled your email or used the wrong account, we will need the name of the correct account and your transaction ID.
Someone has migrated your Minecraft account to a Mojang account with a different email address
If you previously logged into your account with your username, and are now instructed by the system to use your email address, first try logging in with your email address. If you are unable to log in and/or do not see your account listed, you'll need to contact customer support. If the account was migrated to a different email address, we can change it back to the original without additional verification. If you need to change the email to something else, please provide the transaction ID and what the email address should be.
To have a customer support representative fix one of the issues above, please contact customer support.