Go beyond one-off blocklist checks
IP Blocklist Check and Monitoring: Send With Confidence
Mailora monitors your sending IPs across 40+ DNSBLs continuously, not just pass/fail.
Used by deliverability teams at high-volume SaaS and e-commerce brands.
Why a One-off Blocklist Check isn't Enough
Checking when something feels wrong means the damage is already done. Blacklisting doesn't wait for your next check.
126,000+
IPs get blocklisted every day
842,000+
in any rolling 7-day window
Your IP can get listed between campaigns, between sends, over a weekend with no bounce, no alert, no indication anything changed. By the time open rates drop and you run a check, the listing has been active for days.
Not all blocklist hits are equal but free tools treat them like they are
Spamhaus ZEN is queried billions of times daily by Gmail, Outlook, and Yahoo. A listing there can create deliverability across every major mailbox provider simultaneously. A listing on an obscure regional DNSBL that no major provider consults does almost nothing.
Free tools return the same red icon for both with no severity weighting, no inbox impact context, or no indication of which one actually matters.
A Clean IP doesn't mean your emails are landing
A clean IP doesn't guarantee inbox placement. SPF misalignment, broken DKIM, a p=none DMARC policy, declining engagement, a poisoned list segment, any one of these compounds a blocklist hit into something far more damaging than the listing alone. Checking only your blocklist status tells you one data point. Mailora shows you how that data point fits into the rest of your sending signal.
Manual lookups don't scale
Five sending IPs. Fifteen client domains. Three dedicated pools and two shared ranges. Cycling through free tools one IP at a time isn't a monitoring workflow. It's a liability and every hour between checks is an hour a listing can go undetected
What Changes When Blocklist Monitoring Becomes Part of Your Deliverability Intelligence
Monitoring That Runs While You Sleep
Blocklisting doesn't follow your send schedule. A listing that appears between campaigns, over a weekend, or during a DNS change will sit undetected until something measurable breaks. Mailora watches your sending IPs and domains across 40+ DNSBL and RBL databases continuously. You find out when a listing appears, not when a campaign has already underperformed.
- Continuous automated monitoring
- Coverage before, during, and after every send.
- No manual rechecks. No missed windows
One IP, for every IP, domain, and client
Cycling through free tools one IP at a time stops working the moment you're managing more than a handful. Mailora monitors your entire sending infrastructure from one view, dedicated IPs, shared pools, multiple client domains, continuously, without checking each one separately. Practitioner-grade depth without enterprise overhead.
- Agencies managing client portfolios at scale.
- SaaS teams with separate product, marketing, and transactional sending domains.
- E-commerce brands running multiple storefronts across different ESPs.
See your IP blocklist status and deliverability signals in one view
How Mailora's IP Blocklist Monitoring Works
From detection to resolution, here's what's inside.
Multi-list DNSBL and RBL Scanning
Continuous checks across Spamhaus SBL, XBL, PBL, and ZEN, Barracuda, UCEPROTECT Levels 1 through 3, Spamcop, and 30+ more. UCEPROTECT Level 2 and 3 listings affect entire IP ranges, not just individual addresses. Mailora surfaces range-level exposure so you know the full scope before it compounds.
Automatic Alerting
The average sender discovers a blocklisting 2 to 5 days after it happens. By then, campaigns have already been sent, reputation has already eroded, and the listing has already done its damage. Mailora closes that gap with automatic notifications when an IP gets listed or delisted, so you're acting the same day instead of discovering the problem in your email data.
Multi-IP and Multi-Domain Dashboard
With Mailora, every IP, every domain, every client is monitored continuously from one view. No cycling through free tools for each lookup. No manual tracking of which IPs were last checked and when. Blocklist status across your entire sending infrastructure, in one place.
Trend Graphs and Historical Data
A one-off check shows you where you stand today. It won't tell you that you've been listed on Barracuda three times in the last 60 days, always after a volume spike to the same list segment. Mailora's historical data shows blocklist status over time so you're diagnosing systemic sending issues, not just reacting to individual events.
Trusted by Email Teams Who Can't Afford Deliverability Blind Spots
For email professionals who need more than a pass/fail score.
"As an ESP managing multiple sending domains across clients, we need consistent visibility into inbox placement and sender reputation at scale. Mailora helps us monitor performance across accounts and identify deliverability risks early, before they impact our customers."
"As a marketing strategist and founder of Nexa Engage, data-driven decisions are non-negotiable for us. We use Mailora both for our internal campaigns and for our clients. What stands out is the reliability of their data. It gives us clarity before we scale campaigns and confidence when advising clients on deliverability strategy. Mailora isn't just a tool in our stack. It's part of our decision-making process."
"Mailora helps us keep a close eye on our outgoing communications. It's a reliable way to ensure our emails are reaching our clients' inboxes as intended, providing an extra layer of visibility for our day-to-day operations."
"We use Mailora to get a quick, accurate snapshot of how our campaigns are performing. It's become a useful part of our toolkit for identifying delivery trends and ensuring our data remains consistent as we scale."
Your blocklist status is one signal. See the full picture.
Manual checks find listings after they've already cost you. Mailora finds them before your next send is affected.
IP blocklist status and deliverability signals in one view. No credit card required.
FAQ - IP Blocklist Check
More questions? See our common deliverability questions or read the latest insights on email authentication on the Mailora blog.