An email sent to Jeffrey Epstein in September 2010 presented an intriguing opportunity. “Would you be interested,” it read, “in having all that crap that comes up on Google search on your name basically disappear?” Mr. Epstein had been released from jail about a year earlier after a conviction for sex crimes involving a minor. His online reputation was a shambles. Less than two hours after receiving the email, he responded: “ Yes. ” That helped kick-start a yearslong quest by Mr. Epstein to