Although Runbox always tries to encrypt your email during transfer between you and our servers, and between our servers and other email providers, the only way to truly ensure that your email can’t be read by anyone you don’t intend it to be read by is to use end-to-end encryption. This ensures that messages never leave your computer in a readable form, and are never stored on your computer in a readable form.
End-to-end encryption ensures that only you and your intended recipients can read the content of messages.
There are two popular methods for encrypting email this way; PGP and S/MIME. In the table below we show some examples of ways you can send encrypted email with your Runbox account.
|Email Client/Interface||Operating Systems||Encryption Type
|Runbox Mail Manager||All (browser based)||With browser plugins installed. Mailvelope, Gpg4win and GPGTools can provide basic PGP/Inline encryption of text in some browsers. Attachments are not encrypted.|
|Runbox Roundcube||All (browser based)||PGP (PGP/Inline only) with plugin installed.
Attachments and HTML messages are not encrypted.
|Thunderbird||Windows, OS X, Linux||S/MIME, PGP with Enigmail add-on.|
|Apple Mail||OS X||S/MIME, PGP with GPGMail add-on (as of release 2018.4 GPGMail is no longer free software).|
|Microsoft Outlook||Windows, OS X||S/MIME.|
|Windows Live Mail||Windows||S/MIME.|
also MailDroid Pro
|Android||S/MIME and PGP with Crypto plugin.|
|K-9 Mail||Android||PGP with APG installed.|
PGP v S/MIME
PGP and S/MIME both work in similar ways, but there are some differences between the two that are important to note.
Note: Runbox currently provides help and support for PGP when used with the email clients and webmail systems outlined in the table above.
Setting up OpenPGP Encryption
Using freely available software that offers encryption based on the OpenPGP standard (PGP stands for Pretty Good Privacy), you can begin securing your email against unauthorised access.