outlook.com
I'm sending an email to let's say xyz@hotmail.com and Hotmail returns error email that the email was not delivered to xyz@hotmail.com – same as when the account does not exist. So I have tried to register it and it says that I cannot register that account.
Why I cannot register it?
Is there any waiting period?
(Note that the account name that I'm trying to regiter is not something like mail@hotmail.com or admin@hotmail.com.)
When you log in into your Hotmail client, you should be able to go to Options and then choose Upgrade to Outlook.com
It also should not matter, what you use as login to your Windows Live account - it can be even GMail.
From what I've read here, and here, everything indicates that you can't add back your original myname@hotmail.com, or at least not right now, but you might have some options:
Wait for a rather longer amount of time, until the address is free and create a new account with it. (Not a new alias because it won't let you.) This period can vary from 30 days to 1 year. The thing is that in the mean you'll have to let everyone know that your address is another one.
Pretend that you've been hacked and try to convince MSN costumer help to revert your account status to a date before the alias was deleted. To do this, it's IMPORTANT to first BACK UP all your e-mail, contacts and calendar because there is also a chance that the account could get blocked permanently. To back up all e-mail, I would move the mail on every folder (including Sent and Archived) to Inbox and then access the original account with Gmail or Thunderbird through POP. You might need to create an alias ending in @outlook.com for your screwed up Microsoft account. It might be also a good idea to ask to revert the status of your account from a different IP location (as if your computer were compromised and had so many virus that it became a zoo...)
The second method is riskier but you'd be able to recover your myname@hotmail.com faster.
Let us know how everything turned out.
Best Answer
Hotmail will not let anyone else register with an existing Windows Live ID username before 365 days after that username has been cancelled/deleted.
It may also be possible that someone has registered a Windows Live ID username without opening a hotmail account. In that case, nobody else can use that Windows Live ID username in a hotmail email-address.