I have no idea what e-file.com is, or whether it is legit or not. And I don't know why it would popup, such as adware perhaps?
What did that popup have to say about e-file.com or want you to do??
I'll see if anyone else has heard of it, and if I learn anything will report back tomorrow.
I have no way of knowing if you finished efiling or not. Did you go all the way to the last screen where there is a button "Transmit Returns Now", and clicked on that button?
If so, you should get 2 emails. The first one relatively soon saying that you have successfully submitted your return. Then that one will be followed by a second one within 24-48 hours (or sometimes much sooner), that your return has been either accepted or rejected.
After 24 hours, I can tell you another way to check, but it is too soon to use the efile check tool.
What does it show on the Welcome Back page when you log in? Have you checked your email? Also look in the spam/junk email folder just in case it ended up there.