The Email Domain Reputation Checker That Scores Any Sender.

4 per day from this page, no account, no card. The widget takes a bare domain like acme.com or a full address, either counts as one check.

When the daily four run out, wait 24 hours or create a free account for 1,000 checks on the spot, 2,500 if your signup email is a work address. Past that, credits are pay-as-you-go and never expire on any paid plan, with volume pricing shown for your region.

Email domain reputation is the trust score mailbox providers assign to your sending domain. It rises and falls with the signals we read on every check:

• Blocklist and DNSBL history for the domain and its IPs, including Spamhaus, Barracuda, and SORBS listings
• Authentication posture: the SPF TXT record, DKIM selector keys, and the _dmarc policy record
• MX configuration and whether the mail host resolves cleanly
• Domain age and how long it has been sending mail
• Disposable, parked, or throwaway-domain patterns

Verifox folds these into the sender-reputation read inside its verdict, so a shaky domain reads as risky before you ever hit send.

Reputation is one of the nine checks our engine runs in parallel on every address. When you test email domain reputation here, we pull the domain’s blocklist history, inspect its SPF, DKIM, and DMARC records, confirm its MX setup, and weigh its age, then roll all of it into one confidence score.

The reputation read sits alongside syntax, MX, SMTP, catch-all, disposable, and role-address checks. If you only want the blocklist slice on its own, the email blacklist check runs the very same engine.

Yes. The free tier gives you 1,000 checks (2,500 if you sign up with a work email), so a domain email reputation check across most small lists is covered outright.

For larger lists, our paid credit packs are pay-as-you-go and never expire, with pricing localized to your region on the pricing page. CSV upload, API access, and bulk parallel processing are included from the free tier up.

No. Whether you submit a bare domain or a full address, the lookup runs in memory and is gone the moment the verdict returns. There is no query log to mine, share, or leak.

Verifox is SOC 2 Type II compliant, with the full Trust Center report available on request, and the privacy policy spells out exactly what crosses the wire during a reputation check.

Fix the inputs that mailbox providers actually grade. Publish and align SPF, DKIM, and DMARC, warm new domains slowly, keep bounce and complaint rates low, and stop sending to dead addresses. A clean list is the single biggest lever, because bounces and spam-traps are what drag a domain down in the first place.

So the durable fix is hygiene: scrub every list with an email verifier before each campaign. Verifox flags the risky addresses so they never enter your sending stream, which is how a sender reputation recovers and holds.

A blacklist check answers one yes-or-no question: is this domain or IP currently listed on a blocklist. Domain reputation is the broader picture. It weighs blocklist history alongside authentication, MX health, and domain age to estimate how mailbox providers will treat your mail. Verifox returns both from the same nine-check engine.

If you want the listing slice on its own, the email blacklist check is the focused view, and the free email validator is the same tool tuned for address-level validation. All three share the same accuracy and the same free tier.

A single reputation read returns in about 380 ms at the median, and under 50 ms when the result is cached. Bulk jobs stream at roughly 10,000 emails per minute on the standard tier, so scoring every sending domain in a CRM is a minutes-long job, not an overnight one.

Uptime is contractual: 99.9% on Starter, 99.99% with an annual Volume contract. Live status and incident history sit at status.verifox.ai, and the API docs cover the request and response shapes.

Yes. The REST API reference documents the inbound and outbound shapes for every endpoint, so you can drop real-time reputation and deliverability scoring into signup forms, CRMs, or any tool that speaks REST. HubSpot, Salesforce, Zapier, Klaviyo, Mailchimp, and Brevo all connect out of the box.

Verifox also ships native MCP server support so AI agents (Claude, Cursor, custom LLM apps) can score domains without glue code. Drop the MCP URL into your agent config and the tools are wired.