Your IP address 18.207.237.223 is not listed on any SpamRATS blocklist.
SpamRATS listings are intended only for public-facing email servers that send mail directly to the internet. If your system does not operate as a public mail server, there’s no further action needed.
For ongoing monitoring and diagnostics, you can use tools below
MXToolbox 🡥 HetrixTools 🡥
Does IP Address resolve to a reverse hostname... Passed!
Does IP Address comply with reverse hostname naming convention... Failed!