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Free Email Security Tool
Instantly check if your domain or IP is listed on 18 major email blacklists (DNSBLs). Get delisting instructions if you're on any blocklist.
Free forever · 18 DNSBLs checked · Domain or IP
A silent SPF or DKIM change can quietly send your emails to spam for weeks before anyone notices. Drop your email and we'll alert you the moment something looks off, so you fix it in minutes, not after a deliverability cliff.
Check every aspect of your email infrastructure
Mailsoftly handles SPF, DKIM & DMARC automatically. Campaigns, automation, and analytics in one place.
Free to start with your Google Workspace account. No credit card required.
This free blacklist checker tests any domain or IP address against 18 major DNS blacklists (DNSBLs), including Spamhaus ZEN, SpamCop, Barracuda, SORBS, PSBL and Mailspike. Mailbox providers consult these lists when deciding whether to accept your mail, so a single listing can push entire campaigns to spam or get them rejected outright. The checker resolves your domain to its sending IP, queries every list live, and shows a clean or listed status for each one so you know exactly which operator to contact for delisting.
First fix the cause, then request removal. Common causes are a compromised account sending spam, purchased or stale lists generating complaints, and missing authentication records. Once the source is stopped, go to the operator of the specific list you appear on and follow its delisting process. Each list has its own procedure and timeline, and if you skip the root cause fix you will usually be relisted within days. Re-run the check above after delisting to confirm you are clean.
