K-9 Mail Alternatives

K-9 Mail is described as 'K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more' and is a very popular Email Client in the office & productivity category. There are more than 25 alternatives to K-9 Mail for a variety of platforms, including Android, Windows, iPhone, Mac and iPad apps. The best K-9 Mail alternative is Thunderbird, which is both free and Open Source. Other great apps like K-9 Mail are Betterbird, Microsoft Outlook, Evolution and FairEmail.