This method can only be applied to mailings of type DOI
Sets DOI key of the mailing with the provided id.

Example

POST https://api.maileon.com/1.0/mailings/17345/settings/doi_key
Content-type: application/vnd.maileon.api+xml
Accept: application/vnd.maileon.api+xml; charset=utf-8
Authorization: [XXX]

<?xml version="1.0" encoding="UTF-8"?>
<doi_key>myNewDoiKey</doi_key>

Status: 204 No Content