Running the fetch_activities cli task stops with a fatal error when the incomming...

Running the fetch_activities cli task stops with a fatal error when the incomming mail parser is unable to determine the ezcMailDeliveryStatus. The fetch_activities task will continue to download and attempt to parse the offending email, dying every time. This prevents other mails from being downloaded and parsed.

Error Message: "No clue about the ezcMailDeliveryStatus"

This patch catches that error, prints it, marks the offending email ignored, and allows activities processing to continue.