Set the recommendation bit on receivers with bad email addresses to be False

[GoogleCodeExporter]

This will allow us to avoid needing to do a check on the email_re at
recommendation time, which could slow us down.

"I'm wondering if we should run email_re against all receivers in the
database and set their recommend field to False if they don't pass.  This
would also solve the bug I think, and might be more efficient than running
a regex on every friend every time we see a new post.  The new client
update should prevent new badly-formatted emails from being entered into
the database."

Original issue reported on code.google.com by [email protected] on 27 Aug 2009 at 3:43