Check an IP or domain against 10 major email blocklists in one go.
Blocklists (DNSBLs) are databases of IPs and domains known for sending spam. Inbox providers check them when deciding whether to accept your mail, so a listing can quietly wreck your deliverability. We query Spamhaus, Barracuda, SpamCop, SORBS and others.
Each blocklist has its own delisting process. Fix the underlying issue (compromised account, open relay, or a bad shared IP) first, then submit a removal request on the listing provider. DeliverSignal monitors your sending IPs daily and alerts you the moment you get listed.
DeliverSignal runs these checks daily and alerts you when something breaks.
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