Mailpile 1.0.0rc6 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. The actual developer of this free Mac application is Bjarni Rúnar. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. Mailpile for Mac relates to Communication Tools.
From the developer:
Mailpile is a modern, fast e-mail client with user-friendly encryption and privacy features. Powerful search and tagging make your pile of mail easily manageable. The program is designed to be fast and responsive, outperforming "the cloud" even on slow computers. Your search index is encrypted so if your computer gets stolen, your mail stays secure. OpenPGP signatures and encryption are part of Mailpile's core design.
You may want to check out more Mac applications, such as Address Book to HTML, MailBrowser or Encrypt Mail, which might be similar to Mailpile.
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