DNS Protocol Library
MX Record Lookup Tool
Perform a free online MX lookup to check mail exchanger records for any domain. Analyze mail server hostname routing priorities and SMTP configs.
Query Live MX Records
Perform a real-time network request to fetch active MX mappings for any target domain.
Open Diagnostic ConsoleWhat is a DNS MX Record?
A Mail Exchanger (MX) record specifies the mail servers responsible for accepting incoming email messages on behalf of a domain name, using priority numbers to establish routing chains.
RFC Zone File Example Format
In standard zone files, a MX record is declared using the following syntax structure:
example.com. 86400 IN MX 10 mail.example.com.CLI Terminal Query Example
Verify this record type locally using standard terminal debugging tools:
dig example.com MX