Comment 1 for bug 1060454

Here's some notes from Aaron about this issue.

12:53 <AaronZ-PLS> edoceo: Playign with this now and if the patron email address is missing, Evergreen will create the entire email but sendmail will not send it
12:56 <AaronZ-PLS> Also note that if you want to use a fixed email address for the "from" field (ie: <email address hidden>), you only have to put in the email address as text. You dont need
                   to put the address inside of the percent sign/square brackets like the default variables are
12:58 <AaronZ-PLS> A worthwhile addition as a new validator might be to detect invalid email addresses (ie: missing the @ sign, no email address at all, etc) and skip those addresses or
                   mark them as invalid so that the system doesnt have to process them

I've also tested this code in my Evergreen working environment and it seems to behave as expected.