I would think its fairly important you use your government email address while conducting government work. There are a number of reasons why using a personal email is bad. Also, it wouldn't be this big of an issue if she doesn't run for president. Continue rant.
This is desperation. They have nothing on her so they bring up this shit. Colin Powell said he used his personal email for government business all the time as Secretary of State. The only reason it matters to the GOP is because it's Hillary.
First, it is illegal as it is outside of record keeping and second, IT WAS HACKED by a Romanian who gave it to the Russians. The nerve of it I know! Why should we give a shit about National Security at all? Everything the Secretary of State does should be public knowledge right? The most transparent administration in history...
Actually when Powell did it it was legal and no one has ever questioned his integrity. HRC did in spite of a regulation that was promulgated by the president she served. I'm Going to let a little bit more details come out before I make a judgement on this specific issue but it looks pretty suspicious. The Clinton's have a long history of flying close to the legal sun and escaping without being burned. It will be interesting to see if it continues.