ns.checkeremail.com

ns.checkeremail.com is a mail server (MX) used by 1 checked domain. Based on public DNS, it looks healthy.

IP & reverse DNS

IP address	Reverse DNS (PTR)	FCrDNS	DNSBL
52.101.9.84	mail-mn0pr04cu00204.inbound.protection.outlook.com	Yes	Not listed
52.101.194.164	mail-ch5pr04cu00204.inbound.protection.outlook.com	Yes	Not listed
52.101.42.87	mail-co2pr03cu00207.inbound.protection.outlook.com	Yes	Not listed
52.101.40.26	mail-cy7pr21cu00102.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c95d::a	mail-ph5pr04cu00102.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c918::5	mail-byapr05cu00805.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f907::	mail-dm2pr02cu00100.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f909::4	mail-bn0pr03cu00304.inbound.protection.outlook.com	Yes	Not listed

FCrDNS (forward-confirmed reverse DNS) passes when the IP’s PTR name resolves back to the same IP. It is a key signal that a mail server is legitimately configured; servers without it are widely treated as suspicious.

Server software

Detected software	Microsoft Exchange / 365 (from SMTP banner)
SMTP banner	`220 BN3PEPF0000B06A.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Thu, 8 Oct 2026 08:16:09 +0000 [08DF21211749DB25]`

Captured passively during an earlier check — we do not actively scan mail servers.

Domains using this mail server

edwards.com

What does this mean?

These are public DNS facts about the mail server ns.checkeremail.com — the host that other servers connect to when delivering email for the domains above. We do not actively probe it over SMTP; the checks here are reverse DNS, forward-confirmed rDNS and public blocklists.

To look up a specific domain’s mail setup use the MX Lookup, or verify an address with the email checker. Learn more in email servers explained.