Summary:
Ref T3306. Moves this from the web to the CLI, which is a tiny bit clunkier but way better as far as policies go and more repeatable for development.
See discussion in D6413.
Test Plan: Ran `bin/mail receive-test`, verified mail was received. Used and abused various options.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3306
Differential Revision: https://secure.phabricator.com/D6417
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