Email Blacklist Checker

See if your domain or mail server is on an email blacklist.

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When your domain or mail server lands on an email blacklist, the damage is quiet but severe: messages start bouncing or dropping silently into spam folders, and you usually find out from a customer who never got your reply. It often happens through no fault of your own — a compromised script, a shared IP with a bad neighbour, or a forwarding loop. An email blacklist checker tells you the moment your sending reputation takes a hit, while it is still easy to fix.

What it checks

Your domain against domain blocklists (Spamhaus DBL, SURBL, URIBL)
Your mail-server IPs (from MX records) against email DNSBLs
Spamhaus, Barracuda, SpamCop, SORBS, UCEPROTECT and more
A clear verdict — clean, suspect, flagged or blacklisted
New listings over time, so a fresh listing raises an alert

Why it matters

Email deliverability rests on a reputation you cannot see until something breaks — and by the time customers report missing replies, you have already lost messages and trust. Because a listing can appear overnight from a single incident, a one-off check goes stale fast. Continuous monitoring catches a listing while it is still easy to investigate and request removal, before it quietly costs you conversations and revenue.

How BrandSentryPro does it

Add your domain and BrandSentryPro resolves its MX records to the mail-server IPs, checks those against the major email blacklists, and checks the domain itself against domain blocklists. It grades the result, lists exactly which blacklist flagged you, and re-checks on a schedule — alerting you the moment a new listing appears so you can act on delisting quickly.

Frequently asked questions

What is an email blacklist?

An email blacklist (DNSBL/RBL or domain blocklist) is a published list of IP addresses or domains seen sending spam. Mail providers check incoming mail against these lists and reject or junk anything from a listed sender, so a listing directly hurts your deliverability.

Why is my domain or mail server blacklisted?

Common causes include a compromised account or script sending spam, sending bulk mail recipients marked as spam, sharing an IP range with bad actors, a misconfigured mail server, or inheriting a listing from a previous owner of the IP.

How do I get removed from an email blacklist?

First fix the underlying cause — secure the source, stop unsolicited sending, and set up SPF, DKIM and DMARC — then request delisting through the specific blacklist's removal process. Knowing which list flagged you, which this checker tells you, is the first step.