The web giant has overhauled its web-based and Android application and released new native apps for iOS devices and Windows 8.
The new Yahoo! Mail features a streamlined design with improved search functionality, thumbnail previews of attachments and a larger area to view and compose emails.
Yahoo! Mail for Android has been redesigned for enhanced performance and battery life, with thumbnail previews, support for multiple accounts and the option to select more than one message simultaneously added.
"You've told us loud and clear that you want fewer distractions when it comes to email. You want to quickly login, communicate, and get on with your day. And we've listened. Starting today, the new Yahoo! Mail is fast, easy and available anywhere you go," said Yahoo! CEO Marissa Mayer.
"We've redesigned the new version of Yahoo! Mail with speed in mind - getting through your emails is faster than ever before. We've also made your inbox more intuitive and easier to navigate, allowing you to focus on what matters most - your messages.
"And, because mobile is everything these days, Yahoo! Mail now has a consistent look and feel across devices."
The new Yahoo! Mail apps are available now to download, while the web-based service is gradually being rolled out globally.