[AC Question]

sent an email from text on Samsung 4 ; can I retrieve that email; do not want person to view it.

[Rukbat]

Sorry, no. Even with straight email (sent from your email app) if there's a cancel button in the app, and it's been a few seconds since you sent the email, it's probably too late. (People kept complaining that they wanted faster email. Well, that's one of the bad parts of fast email, because once it's delivered it can't be canceled. And with delivery taking seconds, you don't have much hope of canceling one once it's been sent.)