+1 for the SQL challenge questions. I would add some customization for employers in the message that you send out with the challenge. I would also set the rep

+1 for the SQL challenge questions. I would add some customization for employers in the message that you send out with the challenge. I would also set the reply-to / from on the email to match the name and email of the person who is sending it out. If I were using this for job interviews, one reason I wouldn't use it is because it might scare away potential candidates because the email doesn't appear to be from me.