odd list email?

[Malcolm Wallace]

Does anyone know what an "Authentication Text" email message from
    ghcbuild at microsoft.com
to
    cvs-ghc at haskell.com
is about?  I found a couple caught in my spam filter today.
One attached.  It doesn't seem to have a clear purpose, since it
didn't ask me to do anything.

Regards,
    Malcolm
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Subject: Authentication Test
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subject: Authentication Test
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from: ghcbuild at microsoft.com
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