Mail is not deliveing due to 550 Spamhaus blacklist

Mail is not deliveing due to 550 Spamhaus blacklist

I'm currently encountering a critical issue with my email delivery system. Specifically, emails sent to outlook.com and other external email addresses are bouncing back and are unable to be delivered. 

While sending email to outook or other domains i'm getting bounce back email by saying "ERROR CODE :550 - 5.7.1 Service unavailable, MailFrom domain is listed in Spamhaus. To request removal from this list see https://www.spamhaus.org/query/lookup/ "

Additionally, I have identified an issue with my Shopify store, where order confirmation emails are not reaching to  customers, particularly those with email domains such as hotmail.com. The system is generating an error indicating that the email is not delivered. 

I urgently request assistance to resolve this issue at earliest convenience. The timely resolution of this matter is crucial for maintaining seamless communication with my customers. 

Thank you.