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
52.101.11.17	mail-sn1pr0501cu00301.inbound.protection.outlook.com	Yes	Not listed
52.101.60.160	mail-bn0pr04cu00800.inbound.protection.outlook.com	Yes	Not listed
52.101.60.65	mail-bn3pr02cu00101.inbound.protection.outlook.com	Yes	Not listed
52.101.10.1	mail-bn6pr02cu00301.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c803::	mail-bn1pr21cu00200.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c946::10	mail-ch4pr04cu00300.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c903::1	mail-ea2pr04cu00101.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f802::1	mail-sj2pr05cu00101.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 BN2PEPF00004FBF.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Wed, 16 Sep 2026 11:33:12 +0000 [08DF108D55191201]`

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

Domains using this mail server

ne.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.