Addresses checked: 142.251.183.26 (mail, smtp.google.com), 172.253.155.26 (mail, smtp.google.com), 173.194.206.27 (mail, smtp.google.com), 74.125.132.26 (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.