Integrate PGP-Encryption
Maybe you can partner with https://www.mailvelope.com/.
44
votes
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Not a priority for now. Will keep the latest evolutions under observation, but for now we’ll not going to plan this.
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Thearsey commented
How about a Gateway-Based solution?
Every Client, wether a Smartphone, Desktop Client or Webmailer using one digital certificate instantly during the pass through in the Gateway. Regardless from which option you're sending mails, everytime a signature is added to the Mail.
Example: https://support.office.com/en-us/article/Encrypt-messages-by-using-S-MIME-in-Outlook-Web-App-2e57e4bd-4cc2-4531-9a39-426e7c873e26