Proton Mail BETA v1.03 Release Notes

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We are happy to announce the release of Proton Mail v1.03. This update contains a number of important security and functionality improvements. As usual, please completely clear your browser cache to make sure you load the latest version of Proton Mail.

Bug Fixes

  • Can now star messages from the message display page
  • Made some improvements to message quoting behavior

New Features

  • Enabled HSTS [Security]
  • Disabled support for weak SSL ciphers [Security]
  • Disabled support for SSLv2 [Security]
  • Opportunistic TLS for incoming and outgoing emails [Security]
  • Proton Mail now supports most languages
  • Proton Mail now supports the latest versions of Firefox (v29), Chrome (v34+), IE (v11), and Safari (v7.03+)


Known Issues

  • Multiple attachments not properly supported
  • Notification emails are still disabled for now (IP reputation reasons)
  • Older browser versions are not fully supported, please use the latest browser versions.
  • Mobile and Tablet not yet fully supported
  • Emails cannot be sent to Yahoo, this is a problem on the Yahoo end, we are working with them to resolve this.
  • Spam filtering of incoming unencrypted emails not activated yet.
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Andy Yen

Andy is the founder and CEO of Proton. He is a long-time advocate for privacy rights and has spoken at TED, Web Summit, and the United Nations about online privacy issues. Previously, Andy was a research scientist at CERN and has a PhD in particle physics from Harvard University.

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