Addresses checked: 52.101.164.0 (mail, activweb-com01c.mail.protection.outlook.com), 52.101.166.0 (mail, activweb-com01c.mail.protection.outlook.com), 52.101.166.1 (mail, activweb-com01c.mail.protection.outlook.com), 52.101.166.2 (mail, activweb-com01c.mail.protection.outlook.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.