[SpamCop is Blocking Emails from my Securities Platform, NinjaTrader]

According to the block report from my email hosting provider, SpamCop is blocking emails from my brokerage securities platform, NinjaTrader.  How do I get SpamCop to allow those emails through?

Here's a copy of the report from the latest email that was blocked earlier today:

Event:	rejected
User:	-remote-
Domain:
From Address:	bounce+c57fb5.fe92bf-*******=daysforever.com@ninjatrader.com
Sender:
Sent Time:	Jun 10, 2022, 12:37:12 PM
Sender Host:	pc232-12.mailgun.net
Sender IP:	143.55.232.12
Authentication:	unauthorized
spam Score:	0
Recipient:	******@daysforever.com
Delivery User:	daysfo6
Delivery Domain:	daysforever.com
Delivered To:
Router:	reject
Transport:	**rejected**
Out Time:	Jun 10, 2022, 12:37:12 PM
ID:	1nzjVI-000AOC-9r
Delivery Host:	pc232-12.mailgun.net
Delivery IP:	143.55.232.12
Size:	0 bytes
Result:	JunkMail rejected - pc232-12.mailgun.net [143.55.232.12]:39940 is in an RBL: Blocked - see https://www.spamcop.net/bl.shtml?143.55.232.12