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
52.101.40.0	mail-cy3pr04cu00100.inbound.protection.outlook.com	Yes	Not listed
52.101.41.24	mail-sj0pr03cu01600.inbound.protection.outlook.com	Yes	Not listed
52.101.9.87	mail-bl2pr02cu00507.inbound.protection.outlook.com	Yes	Not listed
52.101.8.65	mail-dm6pr04cu00201.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c95d::6	mail-ph0pr02cu00106.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c946::10	mail-ch4pr04cu00300.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f801::	mail-byapr05cu00700.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c927::	mail-bn6pr21cu00500.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 SN1PEPF00036F3F.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Mon, 10 Aug 2026 20:18:12 +0000 [08DEF3226477EFC3]`

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

Domains using this mail server

csculturalcenter.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.