ns.checkeremail.com

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

IP & reverse DNS

IP address	Reverse DNS (PTR)	FCrDNS	DNSBL
52.101.68.12	mail-db9pr02cu00204.inbound.protection.outlook.com	Yes	Not listed
52.101.185.24	mail-zrxpr07cu00100.inbound.protection.outlook.com	Yes	Not listed
52.101.68.29	mail-dbapr03cu00105.inbound.protection.outlook.com	Yes	Not listed
52.101.103.162	mail-miypr03cu00202.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca09::20	mail-as8pr05cu00400.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c967::a	mail-cpjpr05cu00102.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca04::f	mail-db7pr03cu00507.inbound.protection.outlook.com	No	Not listed
2a01:111:f403:ca48::10	mail-miypr05cu00100.inbound.protection.outlook.com	No	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 MI3PEPF0000855A.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Wed, 9 Sep 2026 09:06:15 +0000 [08DF0B03748147A7]`

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

Domains using this mail server

elringklinger.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.