Check result of IP
104.47.58.168
Found an email server running at this address:
This IP is listed by bad reputation in 90% of negative points.
In order for the IP to be removed from this list, the source MTA has to reduce the deliveries to customers who have complained, which have generated a SPFBL rejection prefix at the SMTP layer.
The reputation interval is seven days, so you should wait for this interval after all abuse has stopped.