Skip to main content
Use a domain blacklist check to inspect the configured domain lists before investigating a delivery problem. A listing is one signal; it does not establish how every mailbox provider will handle your messages.
Open the domain blacklist check. Extended API calls use your Spotzee credit balance; see pricing for current rates.

​
Check a domain

1

Enter the domain

Enter a bare domain such as example.com. The API expects a domain field, not a full email address.
2

Choose the scan

Use popular for the smaller configured set or full for all configured domain lists. The API defaults to full.
3

Inspect individual results

Read data.check_results alongside the listed, unlisted and errors totals in data.results. Each result names the list and reports Listed, Unlisted or Error.
4

Confirm and investigate a listing

Check the named list operator’s current guidance. Investigate the cause before requesting removal; this tool does not submit a delisting request.

​
Interpret incomplete evidence

An Error means a check could not complete. An Unlisted result means the tool did not recognise a listing response. Some refused or unexpected DNS responses can also appear as Unlisted, so an all-clear result is not proof that every list accepted the query. The current domain check rejects some valid long domain suffixes. If a valid domain is rejected, use the list operator’s own lookup rather than treating the validation error as a reputation verdict. For delivery troubleshooting, also inspect the sending IP and email authentication. Domain and IP listings are separate checks.