Free Email Tool
Retrieve MX records for any domain. Shows mail servers with priority and identifies the provider.
Look up the MX records for any domain. Identifies receiving mail servers and their priority order.
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Talk to usMX (mail exchanger) records are the DNS records that direct inbound email to the correct mail server. Every domain that receives email must have at least one MX record. When another mail server wants to deliver email to someone@yourdomain.com, it queries DNS for the MX records of yourdomain.com and connects to the highest-priority server that responds. This tool retrieves and displays all MX records for any domain including their priority values and resolved IP addresses.
Each MX record has a priority value (preference number). Lower numbers have higher priority. If the primary MX server (lowest priority number) is unavailable, sending servers try the next in order. Google Workspace uses priority 1 for aspmx.l.google.com. Microsoft 365 typically uses a single MX at priority 0. Having multiple MX records at different priorities provides redundancy — if the primary server is down, mail queues at the secondary rather than bouncing.
No. MX records only control inbound email delivery. Outbound email is determined by your mail server's SMTP configuration and your SPF record. To check your outbound authentication, use the SPF Validator and DKIM Checker.
Yes. MX record hostnames often reveal the email provider. aspmx.l.google.com = Google Workspace. mail.protection.outlook.com = Microsoft 365. mx.zoho.com = Zoho Mail. pphosted.com = Proofpoint. If the hostname is a subdomain of the domain itself (mail.theirdomain.com), they likely run their own mail server.
