Addresses checked: 104.21.75.143 (web), 172.67.177.124 (web), 18.178.141.61 (mail, inbound-smtp.ap-northeast-1.amazonaws.com), 3.113.208.143 (mail, inbound-smtp.ap-northeast-1.amazonaws.com), 52.195.95.66 (mail, inbound-smtp.ap-northeast-1.amazonaws.com).
We check the web server and mail server IP addresses against free spam and malware blocklists. A listing usually means spam or malware was seen recently — follow the list’s own process to be removed.