A little late and I know we talked about this over and over during the election ... but to recap about the mail server. The mail server was not the problem, if she just came out and said something that conveyed "look, I fucked up, it was a mistake, will never happen again" and maybe add in a (legit) excuse of "I am not an IT person, but the buck stops here .. my bad" it would have been talked about on right wing sites/radio ... but would have been over for the general public and they would not have cared.
But she gave a good reminder of a Clinton trait most people cannot stand ... deny, deny, gradually admit to something when facts come out, blame others, deny more, admit some truth when more facts come out, appear that rules that govern others do not apply to them ... and on and on. Plus it kept it in the news forever. All that is what made that a problem for her plus it was a repeat performance for her/them.
The mail server itself was not really the issue, it was how she handled it