Windows 10: Email address

I tried to send an email using live.com, my Microsoft address, and their address was invalid yet when I put the exact address the recipient in Gmail it worked.
Any explanations please.
Thank you
Peter

:)

 

Sir my first email address old email address how do I get my informations into the new one thanks.

In order to help you effectively we need to know exactly what email system you are using. You can see the differences
here



In order to find which version of the email system you are using When you log into the account using a web browser does it say outlook.com, or Outlook Mail across the top?

 

Sir my first email address old email address how do I get my informations into the new one thanks.

Now the issue is getting back all the informations that was in the old email box to my new email box .I also have windows 7 Lap Top which was up-graded to window 10 , Therefore I need assistance on how to use it in transferring and editing my pictures
and movies for the tube etc. thanks for cooperation.

 

Create a alias in live.com. On my default live.com I could receive but not send. I don't know if that's a default or something was not setup on my account.

 

I discovered this by playing around in my MS Account. I forget exactly how I found it. This link may help.
Use aliases to add email addresses to your account - Outlook.com Help