From Sarah Palin's op-ed:

The latest Obama administration scandal involving Hillary Clinton’s emails has many Americans discussing private email accounts used by government officials, and clarification is in order. 
It’s appropriate and proper for a politician to use private email for personal and campaign business. This is what I did as governor of Alaska in order to be in compliance with the law, which requires that personal or campaign business not be conducted using public resources such as a government email account. There is a firm line separating the two. 
However, that’s not what we see with this Clinton email scandal. As Secretary of State under Obama, Hillary Clinton used private email accounts on a privately maintained server 100 percent of the time for 100 percent government business. That’s unethical, no doubt illegal, and flies in the face of all claims of transparency. Hillary Clinton and her staff weren’t trying to be in compliance with the law; they were skirting it altogether. 
Read more at http://www.foxnews.com/opinion/2015/03/09/gov-palin-faced-tough-questions-over-email-so-should-hillary-clinton/