Here’s the e-mail trick Petraeus and Broadwell used to communicate [Washington Post]

For additional email etiquete tips, see Top U.S. Commander in Afghanistan Is Linked to Petraeus Scandal (NYT)

"They wrote their “intimate messages” as draft e-mails in a shared Gmail account, according to the AP, allowing them to see one anothers’ messages while leaving a much fainter data trail. When messages are sent and received, both accounts record the transmission as well as such metadata as the IP addresses on either end, something the two seemed to be seeking to avoid.
[...]
The trick has achieved notoriety as a tactic of terrorists who are rightly wary of espionage."

Here’s the e-mail trick Petraeus and Broadwell used to communicate