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
52.101.60.154	mail-bn0pr03cu00302.inbound.protection.outlook.com	Yes	Not listed
52.101.41.26	mail-sj0pr03cu01702.inbound.protection.outlook.com	Yes	Not listed
52.101.9.21	mail-bl2pr04cu00205.inbound.protection.outlook.com	Yes	Not listed
40.93.192.1	mail-dm5pr02cu00201.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c903::1	mail-ea2pr04cu00101.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f801::	mail-byapr05cu00700.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f90d::	mail-sn1pr0501cu00200.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f909::d	mail-bn0pr04cu01005.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 BN1PEPF00004687.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Mon, 3 Aug 2026 02:35:48 +0000 [08DEEDBA8056D493]`

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

Domains using this mail server

steren.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.