Why does my e-mail come up on messages that people receive from my iPhone?

My friend told me on iMessage that it comes up with my e-mail, when i go to my settings > messages > send & receive to look, I try to choose my mobile number but it seems to be blocked.

Please can someone help?

Because imessage is set up with your email not your mobile number… (i think)

Please Answer Minee

  • Why does my iPhone receive messages late when I'm in a group text? I have the iPhone 4s with 16g (I have less than a gig left of space) and am on T-Mobile. Every single time I'm added to a new group text, my phone delays all messages sent to me. Regardless of whether it's another iPhone or if they're on the same carrier as me, none of my messages get to me until an hour or so later. Is it because I'm low on space? Or is it T-Mobile (probably the worst carrier I've ever had by the way)? Or is it the iPhone software?
  • Why does my iphone not receive group messages unless 4g is on? When I'm at home and I'm using Wi-Fi I always turn off cellular data because I don't want to accidentally be using up my data, but whenever it is off I never receive group messages until I turn it back on? Why does it so this and can I make it so I can still receive group messages when only using Wi-Fi?
  • Why does my iPhone 3gs lag to send and receive messages? I have an 8GB iPhone 3GS. It won't send messages. It can take from 3 minutes to 2 hours to send a message and same with receiving a message. I'm using iMessage. It is updated to the 6.0.1. I don't know how to fix this problem because it stops me from communicating with people.
  • Why do people with iPhones receive email text messages? I have an iPhone and other people I text with iPhones tell why when I text them they get my email instead of my phone number. Why is that is it possible to not to ever send out my email just my number. When I text them with my iPhone.