An early instance of G-mail (Drafts) trick.
The Bureau traced the emails to Broadwell, and noted that Broadwell appeared to be exchanging intimate messages with an email account belonging to Petraeus, which instigated an investigation into whether that account had been hacked into or was someone posing as Petraeus.[191][192][193] According to an Associated Press report, rather than transmit emails to each other's inbox, which would have left a more obvious email trail, Petraeus and Broadwell left messages in a draft folder and the draft messages were then read by the other person when they logged into the same account.