Addresses checked: 216.24.57.16 (web), 216.24.57.18 (web), 172.253.62.26 (mail, smtp.google.com), 192.178.155.26 (mail, smtp.google.com), 192.178.155.27 (mail, smtp.google.com), 64.233.180.26 (mail, smtp.google.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.