You can send a protected attachment (PDF, JPEG) and a message to any email service that is available on Windows.
Free Personal
Windows
sfletter.com protects your message and attachments by one click. email protection from interception and unauthorized actions of the recipient.
* currently the service is running in beta, so it has some restrictions:
email box size is limited to 500mb. total number of recipients for one message should not be more than three. the following restrictions apply to the protection of attachments: protection of not more than two attachments for one email message. protection of pdf and jpeg files only. the size of an attachment is limited to 5mb.
Tutanota is a free and open source web-mail client that focuses on privacy. There's also an Android and an iOS app. All data is stored encrypted and can not be searched, i.e. for commercial usage.
mailbox.org offers a secure e-mail account for home and business use. The domain name, [email protected], is easy to remember and can be understood anywhere in the world.
CommercialAndroidiPhoneAndroid TabletiPadWebKindle FireWindows Mobile
SCRYPTmail is true end-to-end encrypted email service. Email and meta data, i.e sender / recipient are encrypted when you communicate within scryptmail domain.
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