R1:47a5ebb4fec2

Correctly implementing mailkey for Phurl

Summary: Re T6049, Correctly implementing mailkey for Phurl

Test Plan: Edit Phurl URL, receive email.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D14605