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
52.101.9.90	mail-bl3pr02cu00102.inbound.protection.outlook.com	Yes	Not listed
52.101.40.5	mail-cy4pr03cu00105.inbound.protection.outlook.com	Yes	Not listed
52.101.41.58	mail-sj0pr02cu00102.inbound.protection.outlook.com	Yes	Not listed
40.93.192.4	mail-dm2pr04cu00404.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f802::1	mail-sj2pr05cu00101.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f901::	mail-bl3pr02cu00100.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c946::14	mail-ch3pr04cu00104.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c946::3	mail-ch0pr04cu00603.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 BN2PEPF0000A890.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Wed, 2 Sep 2026 18:43:01 +0000 [08DF047FCB9B9C1A]`

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

Domains using this mail server

fusz.com

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.