Please help!!

I was block one email address who was boring with a lot of emails.
 Now I want she back on my list. It is possible, and how?!? 
What happens if I continue to use hotmail.com as my email address when to discontinue hotmail? Will I be automatically switched to outlook.com?
If someone sends you an email from another time zone, does there time come up when they sent it under there email address? Whos time is that?

Using Bcc - how many contacts from my list can I send an email to at one time ?

Thanks

Can you find email messages I deleted several years ago. 
This is how the email read.  Your email has been accessed in multiple locations. Click below to update your Hotmail/msn account  Signed Customer support    Hotmail Team  *** Email address is removed for privacy ***.

I can not find the setting that requests the receiver of my email to respond back to me that they have received it. I had that on my last program but when I had some work done on my computor it was lost.