Thirty-five percent of emails are opened based on the subject line and 69 percent of email users flag an email as spam based on how they respond to the subject line.

Tech entrepreneur Jason Calacanis is shutting down the mobile app of his company's news service at Inside.com. He is replacing the app with what he calls a more engaging channel: email. "I've been beating my head against a wall for the last two years trying to make a news app experience work," he wrote on his blog. "And despite great reviews, I've failed."

Airmail is a new email management app for the iPhone that gives users control. The app allows its users to receive multiple email accounts into one location and then customize the folders and how messages are received and sent. There are star, snooze, archive and toggle features which help users control how they interact with their inboxes.

Yahoo is fighting special liquidators of Irish Bank Resolution Corporation (IBRC) over a request to access the email account of a Yahoo Mail user accused of hiding money. Yahoo filed a response to the request this week explaining that it does not have the authoring to release the contents of its users' email accounts to anyone.

The State Department has been ordered to release four additional Hillary Clinton email drops between this Saturday and the end of the month. U.S. District Court Judge Rudolph Contreras issued an order to make these batches public by the end of February in order to speed up the investigation process.

Calendaring app Charlie has released a new Chrome extension that aims to make it easier for LinkedIn users to uncover the email addresses of other users. The extension will reveal a LinkedIn user's email address, making it easy to copy the address and then compose an email to that person. There is even a feature that lets you ask Charlie to research the person for you and send you the data.

A recent fundraising email sent out by Hillary Clinton has gone viral on social media. In the email, Clinton's team wrote, "I'm not kidding Maddi," to a supporter named Maddi. The supporter started the hashtag #ImNotKiddingMaddi and the meme has taken off online.

A dozen of Hillary Clinton's former top aides used to discuss top secret information, new documents reveal. The report showed that these aides used email addresses on the private email server that Clinton used while heading the State Department for this official business.

Anti-virus software veteran John McAfee argues that a spam email could take down the digital world. In a post on The International Business Times, McAfee points out that email lists are publicly available for most government agencies and corporations and at the same time, most people can't identify a spam email. He proposes that a spammer could hit the DOJ's 123,000 employees and steal about 55,000 logins. This access could then be used to shut down internal systems.

Republican presidential candidates Ted Cruz and Marco Rubio are still using Scott Walker's email list. The politicians have been renting his list and both sent more than than a dozen emails leading up to the recent primaries in New Hampshire and Iowa. Walker, who dropped out of the race last year, hasn't endorsed a candidate so he is able to sell access to his list of 675,000 people to his former rivals.