The address 162.220.232.137 is a shared egress IP used by many workloads, so its Spamhaus listing reflects aggregate traffic and is not something we can change, swap, or pursue delisting for. Enabling Static Outbound IPs on the service (available on Pro) will assign stable addresses you can provide to your SMTP provider for allowlisting, which is the path that resolves delivery issues caused by shared-IP reputation.