checkeremail.com

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
52.101.8.5	mail-dm2pr02cu00105.inbound.protection.outlook.com	Yes	Not listed
52.101.50.10	mail-mw2pr02cu00502.inbound.protection.outlook.com	Yes	Not listed
52.101.10.6	mail-bn1pr21cu00106.inbound.protection.outlook.com	Yes	Not listed
52.101.60.151	mail-bnypr03cu00107.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c92c::	mail-dm6pr04cu00200.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f905::4	mail-dm2pr04cu00404.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c902::1	mail-sj2pr05cu00401.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f913::1	mail-cy1pr02cu00101.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 BN2PEPF000055DC.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Mon, 14 Sep 2026 18:00:28 +0000 [08DF0E37E938C893]`

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

Domains using this mail server

engage.mail.microsoft

What does this mean?

These are public DNS facts about the mail server 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.