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.
K-9 Mail was added to AlternativeTo by JensKristian on Jun 27, 2009 and this page was last updated Jan 13, 2021. K-9 Mail is sometimes referred to as k9mail, K-9, K9.
Easy and reliable open source android email app, have been using this as a daily driver for the last couple of years and have no problems.
open source, stable, customizable
K-9 Mail has the ability to send and receive encrypted mail with the help of OpenKeychain.
i luv this app, has sorting. and can combine all boxes/accounts into one view
Plain and simple, yet very effective.