I sent (or thought I sent) an e-mail to the class today. I just was in contact with one of the class members and she said she never received it so I resent it and I don't think it went out again. I know it isn't coming to my personal e-mail account which they usually do. I have done this before without a problem. Why isn't it going through now?

By now, you have probably already received the email. Our system places outgoing messages in a queue and at times, that queue can build to be hours long. We send out groups of emails in 10 minute increments so that we can avoid being perceived as spam by email service providers. It is possible that you had sent your email during a particularly high volume activity time.