BlueMail 1.143.51 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally produced by Blix Inc. We recommend checking the downloaded files with any free antivirus. The program lies within Communication Tools, more precisely E-mail.
From the developer:
BlueMail is the desktop version of the popular e-mail client used on Android and iOS devices. BlueMail for Android and iOS changed how people manage their e-mail on their mobile devices and is now bringing the same robust features, immense customization possibilities, and user-friendly design to the desktop. BlueMail for desktop provides a more powerful fully featured experience than the traditional webmail client.
You may want to check out more software for Mac, such as SerialMailer, DavMail or Mail Archiver X, which might be related to BlueMail.