ERROR CODE :550 - "JunkMail rejected

Hi, I have 2 days with this error

This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

adoax@mushteri.com.mx, ERROR CODE :550 - "JunkMail rejected - sender3-op-o18.zoho.com [136.143.184.18]:17825 is in
an RBL: Error: open resolver; https://www.spamhaus.org/returnc/pub/172.71.165.210"

Someone can help me please

Thanks

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