Changes to Reply To Message

the request property attachments became not nullable

the request property attachments/items/content became not nullable

the request property attachments/items/content_disposition became not nullable

the request property attachments/items/content_id became not nullable

the request property attachments/items/content_type became not nullable

the request property attachments/items/filename became not nullable

the request property attachments/items/url became not nullable

the request property bcc became not nullable

the request property cc became not nullable

the request property headers became not nullable

the request property html became not nullable

the request property labels became not nullable

the request property reply_all became not nullable

the request property reply_to became not nullable

the request property text became not nullable

the request property to became not nullable

the endpoint scheme security Bearer was added to the API

the endpoint scheme security BearerAuth was removed from the API

api tag inboxes > messages added

api tag InboxesMessages removed

added the new optional request property track_opens

request body became optional

added the non-success response with the status 409

added the optional property code to the response with the 400 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 404 status

added the optional property docs to the response with the 400 status

added the optional property docs to the response with the 403 status

added the optional property docs to the response with the 404 status

added the optional property fix to the response with the 400 status

added the optional property fix to the response with the 403 status

added the optional property fix to the response with the 404 status

added the optional property message to the response with the 400 status