Addresses checked: 194.1.147.20 (web), 194.1.147.53 (web), 192.178.223.27 (mail, aspmx.l.google.com), 172.253.116.26 (mail, alt1.aspmx.l.google.com), 172.253.152.27 (mail, alt2.aspmx.l.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.