Can an MX record point to a CNAME?

No. Mail standards require MX hosts to resolve directly to A or AAAA records, not CNAME aliases.

Why is MX to CNAME considered bad practice?

It can break compatibility with strict receivers and create unpredictable mail routing behavior.

Point the MX record to a dedicated hostname that has direct A/AAAA records instead of a CNAME chain.

Yes, it can cause deferred or rejected connections from stricter receiving servers.

Yes. Matching forward and reverse DNS improves trust and reduces spam filtering risk.

Verify your MX and CNAME records match your provider's requirements.

Many deliverability issues stem from mismatched MX and CNAME records. This tool ensures your routing is perfectly aligned with your email host.

1

Auto-detect email provider

2

Alignment check for MX vs CNAME

3

White-label CNAME verification

4

Priority validation

5

Missing record alerts

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