These emails were sent on a server (gmail) to which the hubby did not have access (at least not to that account).
According to the links up in 47 & 48, we’re talking about 2 different email accounts. One was “an anonymous account” that was used to send the threatening emails to Kelley, an account that’s shared by Broadwell and her husband. This has not been specifically identified as a gmail account.
The 2nd account, the gmail account, was used by Broadwell to play lovey -dovey with General Petraeus. The Wired article in 47 has details and says this at the end:
“...although reports indicate that Broadwell and Petraeus used Gmail accounts to communicate with one another, the e-mail account that was used to send the harassing e-mails to Kelley has not been identified as a Gmail account in news reports.”
I think Mr Broadwell sent the emails to bring down General PetMyWife.