Seald: documentation

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Encrypted email format ​

When you encrypt an email with Seald, it is transformed into an attached file, in the .seald_mail format. This format is simply an HTML file, encapsulating the content of the email, in the following format:

json
{
  "subject": "Subject of the message",
  "from": "hello@seald.io",
  "to": [
    "hi@seald.io"
  ],
  "date": "Monday October 30th 2017",
  "mailBody": "<html><body><div> Content of the email in the rich-text HTML format <br><br></div></body></html>"
}
{
  "subject": "Subject of the message",
  "from": "hello@seald.io",
  "to": [
    "hi@seald.io"
  ],
  "date": "Monday October 30th 2017",
  "mailBody": "<html><body><div> Content of the email in the rich-text HTML format <br><br></div></body></html>"
}

This JSON is then encrypted like any Seald file, in the .seald format.

Automatic detection in Seald integrations ​

Integrations for mail clients react to the presence of an attachment with the extension .seald_mail.seald. The file name is not taken into account, only its extension counts.

If an attachment in the .seald_mail.seald format is found, it will be automatically decrypted and its mailBody will replace the content of the email.

Attachments integrated in the mail body ​

Seald integrations manage mail with images integrated directly in the body of the mail. To do this, the images must be encrypted separately, in the .seald format, and sent as an attachment along with the mail body in the .seald_mail.seald format.

To be decrypted and reintegrated into the mail body automatically, the images must be referenced in the mailBody with a tag. The tags contained in the mail body must be of the form:

html
<b width=IMAGE_WIDTH height=IMAGE_HEIGHT inlineAttachment=ATTACHMENT_NAME>See PJ ATTACHMENT_NAME</b>
<b width=IMAGE_WIDTH height=IMAGE_HEIGHT inlineAttachment=ATTACHMENT_NAME>See PJ ATTACHMENT_NAME</b>

with:

  • IMAGE_WIDTH: the width of the image;
  • IMAGE_HEIGHT: the height of the image;
  • ATTACHMENT_NAME: the name of the encrypted image attached.