I wouldn't worry about that. Things happen. But you know the IRS got it if you got an Electronic Postmark and the IRS took out the payment. Did you open the right return? And get the emails?
When you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepted or Rejected your efile.
For the Desktop program you have to check the filing status inside the program. Open your return and go up to menu item
File > Electronic Filing > Check Electronic Filing Status
