As reported a couple times last year, phishing is pretty common through email. Here is an example of a phishing email received by one of our administrators this morning:
From: Kevin Crider
Sent: Monday, October 07, 2013 3:01 AM
To: Kevin Crider
This message is from IT Service Desk informing you to validate your Email Account, we are conducting an upgrade in all Email Account, all users are to verify his/her account information for upgrade, CLICK HERE to go to Validate your account.
You will not be able to receive new mails until you Re-Validate your Email Account.
Yours,Though Google's email filters should pick this up, if you receive something like this or similar, please mark as spam and remove.
IT Service Desk.
Note: You will only receive IT emails from district IT, never from an outside source. Never give out your account information.