Know you're blacklisted before your leads do.
SendKit scans your sending IPs and domains against major blocklists. You get a health score from 0 to 100 so you know instantly if something needs attention — before it tanks your inbox placement.
Lambda Group
Catch listings before they cost you leads.
A 0-100 score with color coding tells you where you stand in seconds.
Check both sending IPs and email domains against all major blocklists.
No caps, no per-check fees. Check before every campaign if you want.
Find listings before they affect your campaigns, not after.
Blacklists happen. Catching them late is the real problem.
Run a check from your dashboard against all major email blocklists. Select any sending IP or domain in your account.
Results come back with a 0-100 score, color coded: green (90+) means clean, yellow (70+) means caution, orange (50+) means trouble, red (below 50) means stop sending.
If you're listed, you can pause campaigns from that IP, request delisting, and verify you're clean before resuming. Catching it early means fewer wasted sends.
Quick scan before you launch. If your IP got listed since your last campaign, you'll know before burning leads.
Open rates tanked? A blacklist check can rule out or confirm a listing as the cause in seconds.
Some newly purchased domains already have listings from previous owners. Check before you start sending.
Why checking blocklists matters more than you think.
Unlimited checks, not a paid add-on
Some tools charge per blacklist scan or cap monthly checks. SendKit includes unlimited checks on every plan. There's no reason to skip a pre-campaign scan when it's free.
Sending from a blacklisted IP makes it worse
Every email sent from a listed IP deepens the reputation damage. Most teams discover they're blacklisted after a campaign goes out and reply rates crater. By then, the leads are burned and the listing is harder to remove. A quick check before sending catches the problem when fixing it is easy.
Color-coded scoring removes the guesswork
You shouldn't need to Google what a blocklist result means. Green means send. Yellow means investigate. Orange means fix it. Red means stop. The 0-100 scale gives you granularity when you need it, and the color coding gives you the answer at a glance.
Got questions? We've got answers.
SendKit scans against all major email blocklists that affect deliverability. Results are aggregated into a single health score so you don't need to check each list individually.
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