OAE Messages are being marked as spam

Per report from Rob van Leeuwen.

I'm assuming this is related to the `noreply@myorganization` being set as the sender. When we confirm that's the case, we should change this in production and perhaps consider a more intelligent default.

```
Begin forwarded message:

From: Apereo OAE <noreply@myorganization>
Subject: [Spam] I would like to share "Teaching and Research" with you
Date: 7 February 2014 10:30:01 CET
To: <r.g.j.van.leeuwen@vu.nl>
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Mime-Version: 1.0

Hi,

William Cullerne Bown has shared "Teaching and Research" with you.

You may find it by following this link: https://vu.oaeproject.org/discussion/rp/ek4Pc8lHK
```