France just banned after-work email—here's how 7 top execs manage their inboxes

Tilman Fertitta stars in CNBC's "Billion Dollar Buyer"
Jin Lee | Bloomberg | Getty Images

Employees in France now have the "right to disconnect."

The new law, which went into effect this year and affects companies with more than 50 employees, gives workers the legal right to ignore emails from colleagues and bosses when out of the office.

The idea is to reduce off-the-clock stress.

For those who still have to manage an overflowing inbox around the clock, CNBC has rounded up email management strategies from billionaires, CEOs, and successful entrepreneurs.

Seven productivity hacks this millionaire investor follows
Seven routines to up your productivity

Tilman Fertitta flags emails immediately after waking up

"When I go through 80 to 100 emails every morning, I go back and I flag them," the self-made billionaire tells CNBC. "Then, later in the day, I will go back and ask that person questions, or even call them if I want a real detailed answer and not let them off the hook. Being able to flag and come back and look is just great."

The owner and CEO of Fertitta Entertainment also tackles his inbox right away, like other successful business leaders, including Richard Branson and Michelle Phan.

"My morning routine is to get up in the morning, and I truly like to sit there for an hour and drink coffee, go through all my emails, look at all my reports from the night before, give comments, and set up my day that way," Fertitta says.

Right away, he wants to know "what's going on in the world and who's looking for me today."

Tilman Fertitta stars in CNBC's "Billion Dollar Buyer"
Jin Lee | Bloomberg | Getty Images

Liz Wessel uses Boomerang, a plug-in for Gmail

"If something isn't urgent, I use the Boomerang extension for Gmail to make sure that I send non-urgent things to be returned to my inbox the next day or week," the co-founder and CEO of WayUp tells CNBC.

Boomerang allows you to schedule emails to be sent automatically at a specific time and to clear messages out of your inbox until you actually need them. It will also remind you if you don't hear back from someone.

Wessel also puts her Gmail to work: "Like many other CEOs, I use my inbox as my to-do list. I don't let myself go to sleep unless all of my to-do's are done, which means that my inbox is empty."

Liz Wessel
Source: Liz Wessel

Jeff Weiner sends less email to receive less email

"As ridiculously simple as it sounds for such a pervasive problem, I've found this to be the golden rule of email management: Send less of it," the LinkedIn CEO writes. The rule first occurred to him at a previous company when, after two co-workers who were frequent emailers left, his inbox traffic went down by nearly 30 percent.

"Turns out, it wasn't just their emails that were generating all of that inbox activity it was my responses to their emails, the responses of the people who were added to those threads, the responses of the people those people subsequently copied, and so on," Weiner writes.

Now he doesn't send an email unless it's "absolutely necessary."

Jeff Weiner, CEO of LinkedIn.
David Paul Morris | Bloomberg | Getty Images

Amanda de Cadenet creates multiple mailboxes to keep her inbox organized

"I have multiple mailboxes set up for different types of emails: scheduling, personal and business," creator and host of The Conversation tells Marie Claire. "When something comes in, I forward it to the relevant email box and my assistant manages it from there.

"Obviously, 'personal' is for me to respond to, so I go back in at the end of the day and reply to what is urgent and flag what needs to happen at the next available time. Might be fully impractical, but works for the 100-200 emails I get a day."

Amanda De Cadenet, creator and host of The Conversation
Ben A. Pruchnie | Getty Images

Ivanka Trump takes lengthy conversations offline

"I will periodically search my inbox for the most frequent emailers," the entrepreneur writes on Fortune. "In particular, I identify those people who send long, meaty emails that really are better discussed through conversation rather than electronically.

"I find that a handful of 'offenders' make up the lion's share of my email overload. I will then speak to those people and set up a weekly meeting instead to discuss ongoing questions or issues that they need me to address. If something is urgent, they can of course email me. If not, they know they have a scheduled time to check in with me and get feedback."

Socialite and entrepreneur Ivanka Trump.
Getty Images

Michelle Phan checks email in the shower

"While I'm showering, I put on my waterproof phone case so that I can check my emails," the vlogger-turned-millionaire entrepreneur tells NBC's "TODAY." "It's really about maximizing my time and it's all about efficiency."

Michelle Phan, founder of Ipsy at Code Mobile.
Asa Mathat | Recode

Ryan Holmes periodically declares "email bankruptcy," deleting everything so he can start fresh

"Email bankruptcy  —  not unlike financial bankruptcy in principle  —  is an act that involves wiping out all of your existing email 'debt,' i.e. the unread emails in your inbox, and starting over with a completely clean slate. (It also helps to add a little temporary disclaimer to your email signature to let people know.)," the Hootsuite founder and CEO writes on Medium.

"It's not about being lazy or incompetent," says Holmes, who gets hundreds, and sometimes thousands, of emails a day. "It's a frank admission that email has gotten out of hand, as well as a pledge to manage your communications more effectively.

"Of course, I'm not suggesting you make email bankruptcy a regular habit, or get remiss about replying to emails because you know you're eventually going to delete them in bulk anyway. Declaring email bankruptcy is obviously something that can only be done every few years (at most) or it's going to backfire and harm your reputation."

Ryan Holmes, founder and CEO of Hootsuite
kris krüg | Flickr