New member registration and email confirmation

When users sign-up with for subscription. The new user should get a welcome email. I thought I can create the welcome email via plugin in the "Communication" section.

I created one with the days selected at 0 after the subscription is paid. I wrote a nice welcome message, saved it, and activated this message.

When the new users register, they receive a email from
"myececor@box739.bluehost.com" which is coming from my hosting, and only the username and password is in the email.

How to I change the email address of one of my choosing and send the welcome message i created through Membership plugin?