Whenever you are going through the checkout, you are going to be asked a serious of questions - one of them being "what is your email address?"
Now, it's not going to be word-for-word what is in those quotes, but at some point during the checkout process, you are going to be asked for your email.
Make sure to correctly spell your email, because the form will not know whether an email is spelled correctly or not, as long as it has the correct extension at the end "@gmail.com, @aol.com, @hotmail.com, etc". If you put random letter with a random extension (i.e email@example.com), the form is going to think it's the correct email and send your order confirmation accordingly.
Double check before you click submit because it becomes one of those things you type so much that you assume that you typed it right, but you ended up missing a letter or adding an extra one.
If you are 100% sure that you are typed your email right and you are still not getting the confirmation of your order, then you can always contact us
at any time and we will be more then happy to help you!