*Update*

Email from on campus is still experiencing intermittent delays. ITServices is continuing to take steps to reduce mail delivery delays.
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Previous Description (2013-10-01 16:18:53):

Due to current high spam volumes on our mail filters, delivery of legitimate mail is being delayed. ITServices has taken steps to improve delivery, but delays will continue until the spam attack finishes.

Mail is not being lost, only delayed due to the high volumes.