POST api/2.0/mail/messages/attachment/add This function requires authentication

Add attachment to draft

Name	Description	Type	Example
id_message sent in body	Id of any message	number	1234
name sent in body	File name	string	some text
file sent in body	File stream	A stream for uploading files without multipart request	N/A
content_type sent in body	File content type	string	some text

POST api/2.0/mail/messages/attachment/add
Host: yourportal.onlyoffice.com
Content-Type: application/json
Accept: application/json

{
  "id_message": 1234,
  "name": "some text",
  "file": "N/A",
  "content_type": "some text"
}

MailAttachment