Email Provider & Deliverability Checker (SPF, DMARC, DKIM)
Pricing
from $1.50 / 1,000 domain checkeds
Bulk-detect which email provider a domain uses (Google Workspace, Microsoft 365, Zoho, GoDaddy...), its security gateway (Proofpoint, Mimecast...), SPF sending tools, DMARC/DKIM/BIMI and a 0-100 deliverability score. DNS only, no SMTP, $1.50 per 1,000 domains.
One per line. You can paste bare domains (acme.com), email addresses (jane@acme.com) or website URLs (https://www.acme.com/about). Duplicates are removed automatically.
Probe common DKIM selectors (google, selector1/2, k1, s1, mandrill...). Adds ~30 DNS queries per domain; turn off for maximum speed.
Optional. Replace the built-in selector list with your own (e.g. the selectors your ESP uses).
[]Stop after this many unique domains (0 = no limit). Useful for testing.
Higher is faster. 50 is a safe default.
Per-query timeout. Failed queries are retried twice with backoff, switching resolver.