MX Record Checker
Look up mail exchanger records for any domain and verify which servers receive inbound email. MX records matter for replies, support mailboxes, forwarding, and domain reputation checks.
What this checks
MX presence
Confirms the domain has mail exchanger records.
Priority order
Shows which receiving servers are attempted first.
Routing risks
Flags common resilience and placeholder configuration issues.
Inbound routing starts with MX.
Mail exchanger records are the DNS records other providers use when they need to deliver email to your domain. Bad MX configuration can break replies, support inboxes, forwarding, and bounce processing.
Lowest priority wins
Sending servers try the smallest priority value before higher backup values.
Hostnames matter
MX values should point at valid mail hosts, not IP addresses or placeholder names.
Receiving is separate
MX records help receive mail; SPF, DKIM, and DMARC protect sending identity.
MX record questions.
What is an MX record?
An MX record tells sending mail servers which hosts accept inbound email for a domain. The lowest priority value is attempted first.
Do I need MX records to send email?
MX records are primarily for receiving email. Sending still depends on SPF, DKIM, DMARC, reverse DNS, and provider reputation, but missing MX can break replies and support inboxes.
Is one MX record enough?
One MX record can work if your provider is resilient behind that hostname. Multiple records with different priorities can provide backup routing when your mail provider supports it.
Monitor delivery after DNS is fixed
SMTPfast gives you delivery events, bounce tracking, suppressions, and domain authentication status in one place.
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