buildbot emails

[Jeremy Lavergne]

Hello Shree.

I wanted to point out a few possible problems I’ve noticed about emails from the buildbot:
 * mixed-case headers
 * too many recipients

I suspect all headers should be title case while some of them are not e.g. Return-Path versus current Return-path:
Return-path: <noreply at ...>
Authentication-results: symauth.service.identifier
Envelope-to: jeremy at ...
Delivery-date: Sun, 23 Mar 2014 23:41:22 -0400
Content-transfer-encoding: base64
Content-type: text/plain; charset=utf8
Message-id: <20140324034119.AB017140F9B at build.macports.org>

When there are many builds, the recipient list can be quite large. Email services tend to think a huge, sorted list of recipients is spammy. Could we possibly become BCC on the email? Or one email generated per recipient?

Thanks for looking into these.