changing email address

So can any of you computer savvy people help me, I have no idea, am very computer illitereate! haha
So I want to change me email address, it is with xtra, but dont know how to go about it...can you do it so that anything sent to the old address automatically gets forwarded to the new address? I have no idea how many people/companies have my current address and dont want to miss anything
btw am only wanting to change as it has my ex husbands and my name in it, dont want his name in there, he has been gone 2 years!
thanks

I have just done this yesterday, I had to set up another email address for my new TM account and was sick of having to log out and in of both so I set up a link where I receive emails from both email address but only to the one account. I use yahoo tho so might be different for xtra but I will tell you what I did....I went into the options button, under mail options in the new email address there is a POP or forwarding bit, I entered in the box specified my usual email that I use the most and now all the emails for the new address go to the old. was super easy to do. You could set it up the oppsite way so the old email address goes to the new address

Hope that helps