Dominant chords are an essential ingredient in blues music and any music that branches from blues. A dominant chord is composed of the Intervals 1 - 3 - 5 - b7 or C - E - G - Bb if we are in the key of C. I have included a couple voicings below that are friendly shapes for Open-E. One chord uses a 6th string root, the other a 5th string root. Enjoy!
If you are interested in learning more licks like this in Open-E and on slide, you can contact me at email@example.com to set up a lesson. If you would like to support my efforts in form of donation my Paypal is firstname.lastname@example.org and my Venmo is Jarred-Garneau