With differing dates and names swirling around the media, this Wa/Post article may be the best place to begin if you want to understand the timing as to "email creep."

The controversy over her private e-mail setup has moved into a new and, potentially, more serious phase. What had begun five months ago as a relatively narrow question about proper archiving of public records has become a bigger, more politically dangerous one: Whether the then-secretary of state and her close aides, in choosing to use a private e-mail system, disregarded common sense and may have put sensitive information at risk of falling into the wrong hands   . . . . . . .  Clinton’s team was not aware of the Justice Department’s involvement until it was reported late the evening of July 23 by the New York Times   . . . .  The investigation is being overseen by two veteran prosecutors in the Justice Department’s National Security Division. One of them helped manage the prosecution of David H. Petraeus, the retired general and former CIA director who was sentenced to probation earlier this year after pleading guilty to a misdemeanor charge of mishandling classified materials. He was also fined $100,000.

Editor's notes:  This is as comprehensive an over-view of the current investigation into Hillary's private server and all those emails she claims are free of any classified information.  And,  it (the article) seems to have a handle on the dates and names,  as well.  Go to the Washington Post,  here.  If you want to understand just how this mess has evolved,  the Post's article is a good place to begin your search.