Today I received the following email from Phabricator:
```
REDACTED added a revision: Unknown Object (Differential Revision).
TASK DETAIL
https://REDACTED/T25966
EMAIL PREFERENCES
https://REDACTED/settings/panel/emailpreferences/
To: REDACTED
Cc: josh
```
Viewing the mail in the #mail application (for my future reference, it is mail 1491235), shows the following headers:
```
In-Reply-To: <maniphest-task-PHID-TASK-yvbfouqxpuwemfajfvkd@REDACTED>
Precedence: bulk
References: <maniphest-task-PHID-TASK-yvbfouqxpuwemfajfvkd@REDACTED>
Thread-Index: ZDBjOWEyN2M2NDJjOGIyMzY2ZmNhNTY0NWY0IFXn4eM=
Thread-Topic: T25966: REDACTED
X-Auto-Response-Suppress: All
X-Herald-Rules: <27>, none
X-Mail-Transport-Agent: MetaMTA
X-Phabricator-Cc: <PHID-USER-abzwhc667osh5mwd4gk7>
X-Phabricator-Mail-Tags: <maniphest-other>
X-Phabricator-Projects: REDACTED
X-Phabricator-Sent-This-Message: Yes
X-Phabricator-To: <PHID-USER-bz6h6qr3rnvduuvt2dfa>
```
Based on the time that the email was sent, I was able to work out the diff in question (again for my own future reference, it is `D24618`). The view and edit policies on the diff are set to "All Users", so I can't see what the issue is here.