Quick deliverability check
Is your MX posture lock-tight — or open to dropped inbound mail?
Paste any domain and we'll resolve the MX records over DNS, normalise priority + host, and ask an LLM analyst for a 0-100 MX-posture score plus 3-5 plain-English findings. The summary anchors on three concrete risk axes — MX presence (any records at all), provider mismatch risk (single-vendor concentration), and missing fallback risk (no backup at all).
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MX record checker — frequently asked questions
Pair this checker with the guide
Want the step-by-step walkthrough?
The MX record setup guide explains how to publish your mail servers with the right priority weights (RFC 974 — lower numbers are tried first), how to add a backup MX for redundancy, what TTL makes sense for production, how to verify with `dig MX`, and how your MX setup ties back to SPF / DKIM / DMARC posture. Read it when you are publishing a new zone or migrating providers, then come back here and re-check the domain.
Read the MX record setup guide →Pair this checker with the guide
Looking for the bigger deliverability picture?
MX is one of four DNS records that govern deliverability. The email authentication pillar walkthrough explains how MX composes with SPF, DKIM, DMARC, and BIMI as one stack — what each protocol does in the receiver, the order to publish each record so the next layer does not break the previous one, and why Google and Yahoo made all four mandatory in 2024. After confirming the MX posture, use the blacklist lookup checker to check the domain or IP blocklist status before publishing MX for the first time.
Read the email authentication guide →