Does this guarantee Gmail inbox placement?

No. It checks public authentication signals, not reputation or message quality.

Do I need DKIM for Gmail bulk sending?

Bulk senders should authenticate with SPF and DKIM and publish DMARC for the sending domain.

Can this check unsubscribe headers?

No. Unsubscribe headers are message-level signals and cannot be verified from DNS alone.

GMAIL tool

Gmail Bulk Sender Compliance Checker

Run a practical DNS readiness check for SPF, DMARC, MX, and optional DKIM selector evidence.

SenderDNSReceiver

GMAIL

Enter a domain to run the check.

What this checker can verify

The tool checks public DNS records. It can verify SPF, DMARC, MX, and a DKIM selector if you provide one.

What still needs human review

Spam rate, one-click unsubscribe, message formatting, TLS posture, abuse complaints, and actual alignment across every sending stream must still be reviewed in your mail platform.