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
52.101.181.156	mail-wa4pr05cu00104.inbound.protection.outlook.com	Yes	Not listed
52.101.68.12	No	Unknown	Not listed
52.101.185.21	mail-zrxpr05cu00105.inbound.protection.outlook.com	Yes	Not listed
52.101.209.153	mail-cpjpr04cu00101.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca09::20	mail-as8pr05cu00400.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca21::8	mail-matpr04cu00100.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca3c::6	mail-zrxpr04cu00106.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca04::b	mail-dbbpr03cu00103.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.

Domains using this mail server

century21.fr

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.