Attachment input for sending an email. Provide either a file_id (DMS reference) or content (base64-encoded data).
file_id
content
Optional
Base64-encoded file content
DMS file ID reference
File name
MIME type (e.g. "application/pdf")
File size in bytes
Attachment input for sending an email. Provide either a
file_id(DMS reference) orcontent(base64-encoded data).