Spam issues with MYOB statements

[JoelFitz-KWT]

Hey all, we have sent out our statements for the month, and noticed this time a lot bounced due to the receipient mail servers detecting the emails as spam.

We send out around 800 statements, a large portion seem to have bounced. 

Possibly MYOB is on a spam list? Can this be resolved? 

Message example returned here - 

Sent: April 1st 2023, 10:35:59 am

Message: Please contact us immediately if you are unable to detach or download your Statements. Thank you.

Diagnostic-Code: smtp; 550-"JunkMail rejected -
mail135-3.atl141.mandrillapp.com [198.2.135.3]:3347 is 550 in an RBL:
Blocked - see https://www.spamcop.net/bl.shtml?198.2.135.3"