Check if your domain or mail server IP is on any email blacklist (DNSBL). Blacklisted servers have emails rejected or sent to spam.
Email blacklists (DNSBLs) are databases of IP addresses and domains known to send spam. Mail servers check these lists when receiving email. If your sending IP or domain appears on a blacklist, your emails will be rejected or filtered to spam. Getting delisted requires identifying and fixing the root cause (compromised account, open relay, etc.).
Run this check every minute, 24/7. Get alerted by email, SMS, or webhook when something breaks.
Start Monitoring FreeWe check major DNSBLs including Spamhaus, Barracuda, SORBS, SpamCop, and others. Both your domain and your MX server IPs are checked against each list.
First, find and fix the root cause (compromised account, spammy content, open relay). Then request delisting from each blacklist. Most have a self-service removal form.
Set up proper SPF, DKIM, and DMARC records. Monitor sending reputation. Use double opt-in for mailing lists. Keep your email server patched and secured.
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