Specialist check
Recipient domain preflight checker
Enter recipient domains and find routing or gateway signals to drop, quarantine, or review before launch.
- Checks
- Extracts up to 50 unique domains and checks public MX routing, provider, gateway, SPF, and DMARC signals.
- Cannot tell
- It does not validate an individual mailbox or predict whether a message will be accepted or placed.
Expected time: about 5 to 20 seconds. Some public services can take longer.
Source: Live Google Public DNS. Input is parsed locally and only extracted domains are queried.
Questions
It extracts unique domains from pasted emails or domains, checks MX records, detects the receiving provider, flags common security gateways, and notes whether SPF and DMARC records are visible.
Free inboxes are often outside a B2B ICP, and domains behind Proofpoint, Mimecast, Barracuda, or similar gateways may apply stricter filtering. Use those flags to drop, quarantine, or review rows before launch.
No. It checks recipient-domain infrastructure, not individual mailbox existence. Use it before mailbox validation or enrichment to remove domains that are obviously risky or unable to receive mail.
No. The checker runs in your browser using public DNS lookups. Pasted emails and domains are not sent to an OutboundQA backend.
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