Sr Fax Callback
Webhook for SRFax send-result callbacks (the per-fax sNotifyURL).
SRFax posts FaxDetailsID and ErrorCode for every send; ErrorCode is empty on success, so only failed sends do any work.
post/sr_fax_callback
Response
Successful Response
{"stackTrail":"paths:/sr_fax_callback:post:responses:200:content:application/json:schema","oasType":"schema","type":"unknown"}