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
52.101.194.17	mail-ch5pr02cu00401.inbound.protection.outlook.com	Yes	Not listed
52.101.40.5	mail-cy4pr03cu00105.inbound.protection.outlook.com	Yes	Not listed
52.101.50.4	mail-co1pr03cu00404.inbound.protection.outlook.com	Yes	Not listed
52.101.41.201	mail-byapr03cu00201.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f913::1	mail-cy1pr02cu00101.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c902::16	mail-byapr04cu00306.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:c946::4	mail-ch0pr04cu00504.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f90a::8	mail-bn0pr05cu00100.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 BN1PEPF0000468B.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Fri, 28 Aug 2026 15:27:55 +0000 [08DF042B7F7DF378]`

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

Domains using this mail server

agricultura.rs.gov.br

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.