And it's a pain to send them all the e-mails.

FORBES: Why Facebook Is So Formidable

Special software allows them to send untraceable e-mails from concealed internet addresses.

ECONOMIST: The internet allows the malicious to menace their victims

So if 10 percent of them could not send or receive e-mails, that, potentially, could be as many as 35 million people.

CNN: When losing e-mail is like a snow day

Many filter out mass e-mails and send them straight to the trash can.

ECONOMIST: Spam in the dock

They did not send e-mails, but saved them to the draft folder instead in an effort to avoid a digital trail.

FORBES: Petraeus Scandal Shows How Transparent Online Communications Can Be

According to published accounts of the affair, Broadwell used the same computer to send harassing e-mails to a woman who sent them to a friend at the F.

FORBES: Petraeus Scandal Shows How Transparent Online Communications Can Be

Send less to receive less: Keep your e-mails short, and write fewer of them.

FORBES

We're saving e-mails, so we need the messages online, along with a mechanism to actually send them.

FORBES: E-Mail Time Capsule