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
52.101.185.114	mail-zrxpr04cu00102.inbound.protection.outlook.com	Yes	Not listed
52.101.185.24	mail-zrxpr07cu00100.inbound.protection.outlook.com	Yes	Not listed
52.101.103.137	mail-miypr02cu00101.inbound.protection.outlook.com	Yes	Not listed
52.101.73.145	mail-am6pr02cu00301.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca04::f	mail-db7pr03cu00507.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca48::a	mail-miypr02cu00202.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca09::26	mail-am8pr83cu00106.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:ca04::a	mail-du0pr03cu00102.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 DU2PEPF00028D01.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 28 Jul 2026 14:41:05 +0000 [08DEE88810C05FB2]`

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

Domains using this mail server

dssmith.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.