Blacklist Check and Monitoring
Check any domain or IP against 100+ blacklists and SPF, DKIM and DMARC in seconds. Turn on monitoring and know the moment you get listed.
Checks run by DNS only. Nothing is sent from or to your domain.
- Listed
- 2
- Clean
- 104
- Inbox
- 71%
- New sending IP 185.62.14.20 is listed on 2 blacklists (Barracuda, PSBL). Delist steps are ready.
- DMARC alignment fails for 14% of messages, all from one ESP signing with its own domain.
- Inbox placement dropped from 94% to 71% at Outlook since Tuesday.
- Spamhaus ZEN IP Clean 12 ms
- Barracuda BRBL IP Listed 31 ms
- SpamCop IP Clean 18 ms
- Spamhaus DBL Domain Clean 9 ms
- UCEPROTECT L1 IP Clean 44 ms
A check shows today. Monitoring shows the minute it changes.
Most teams learn they are blacklisted from a client or a falling open rate, days late. The same check, run on a schedule with alerts, turns that into a five minute fix.
- Blacklists answered104 of 109
- Listed onBarracuda, PSBL
- SPF 12 lookups
- DMARC p=none
185.62.14.20 was listed on Barracuda BRBL.
Mail to inboxes behind Barracuda filters will bounce. The removal steps are attached.
SPF for northwind-supply.com now needs 12 DNS lookups.
The limit is 10, so receivers return permerror. The finding names the include to remove.
185.62.14.20 is no longer listed on Barracuda BRBL.
Every DNS signal that decides where your mail lands
Blacklists are one cause of the spam folder. Broken authentication and DNS records are the others, so we watch them in one place.
| What we watch | What it catches | Alert when | Plans |
|---|---|---|---|
| 100+ IP and domain blacklists | Spamhaus, Barracuda, SpamCop, UCEPROTECT, PSBL, SURBL, URIBL and more | Listed or delisted | All |
| SPF, DKIM, DMARC, BIMI | Lookup limit over 10, missing keys, weak policy, record changes | Record changes or breaks | All |
| DMARC aggregate reports | Every IP sending as your domain, aligned or not | Shown when you upload a report | All |
| MX, PTR, MTA-STS, TLS-RPT | Broken reverse DNS, missing mail servers, transport security | Record changes or breaks | All |
Built for teams that send for a living
Hundreds of client domains, one view.
Bulk add every sending domain and mailbox domain, label each batch by client, and get one Slack message the minute any of them lands on a list.
How it works for cold email agencies
Catch the broken sender before the sale.
A new review app or SMS tool starts sending as your domain and fails DMARC. Upload the DMARC aggregate report and its sending IPs show up by source, long before Black Friday volume turns it into a spam folder problem.
How it works for ecommerce
Password resets that always arrive.
Route blacklist and authentication alerts into your on-call tool with a signed webhook. Transactional mail problems open an incident like any other outage.
How it works for saas
Know the day your sending IP gets listed.
Watch your ESP sending IPs and your domain on 109 blacklists, so a listing is an alert you act on, not a revenue dip you explain later.
How it works for newsletters
Thousands of IPs, watched every 5 minutes.
Monitor up to 5,000 customer IPs and domains on the Scale plan and send each listing to your ticket system with a signed webhook the moment a customer IP gets listed.
How it works for msps and hosting
Every finding is one sentence and one fix
No raw return codes to decode. Each check ends in a score from 0 to 100 and plain findings, ordered by what costs you the most mail.
- Listings
- 1
- DMARC
- 86%
- Inbox
- 71%
- Spamhaus ZEN 185.62.14.31 38 ms clean
- Barracuda BRBL 185.62.14.31 61 ms listed
- SpamCop 185.62.14.31 44 ms clean
- UCEPROTECT L1 185.62.14.32 52 ms clean
- SURBL multi northwind-supply.com 29 ms clean
-
New sending IP 185.62.14.20 is listed on 2 blacklists (Spamhaus SBL, Barracuda).
Fix. Fix the cause, then request removal. Both delisting links and the steps are in the alert.
-
SPF uses 12 DNS lookups. The limit is 10, so receivers return permerror.
Fix. Remove the include for the tool you stopped using and flatten the second level includes.
-
DMARC alignment fails for 14% of messages, all from one ESP.
Fix. Set up DKIM signing with your own domain in that ESP and publish the key it gives you.
-
No PTR record for 185.62.14.21, so Gmail and Yahoo reject bulk mail from it.
Fix. Ask the owner of the IP to publish reverse DNS that points to your mail hostname.
-
p=reject is safe for northwind-supply.com.
Fix. Every legitimate source has passed DMARC for 30 days.
One panel instead of three tools
Most teams stitch together a free blacklist checker, a DNS record checker and a DMARC tool. Here is how the common choices line up, from their public pages.
| BlacklistMonitoring | MxToolbox | GlockApps | EmailGuard | EasyDMARC | |
|---|---|---|---|---|---|
| Starting price per month | $49, or $24 yearly | $129 | $59 | $49 | $36 |
| Automated blacklist checks | Every 5 to 60 min | Hourly on paid plans | Through IP monitors | Weekly | Not the focus |
| Domains on the entry plan | 10 domains and IPs | 5 domains | Not stated | 25 domains | 2 domains |
| Blacklists, SPF, DKIM, DMARC and DMARC reports in one panel | Yes | Yes | Partly | Partly | Yes |
Based on each vendor's public pricing and feature pages in October 2026. Plans change, so check their sites before you decide.
"The free checkers are enough."
They show one IP at one moment. Listings appear overnight and expire on their own, so a weekly look misses most of them.
"Our ESP handles deliverability."
Your ESP watches its own IPs. Your domain, your other senders and your DMARC alignment are still yours to watch.
"We will notice when open rates drop."
By then the list has been rejecting mail for days. An alert at 3 a.m. is cheaper than a lost week of campaigns.
What one unnoticed listing costs
Revenue that depends on email stops quietly when a list blocks you. Put in your own numbers and compare it with a year of monitoring.
Worked example. A store making $40,000 a month by email, blocked at 30% of its subscribers for three days, loses about $1,200, every time it happens. The Business plan costs $888 a year and flags a listing within 15 minutes.
We read DNS. We never touch your mail.
Monitoring needs no mailbox access and no sending rights. What we store is the minimum to show you history.
DNS only checks
Blacklist and authentication checks are DNS queries. Nothing is sent from or to your domain.
No mailbox access
Monitoring never asks for a mailbox login, an API key of your ESP or sending rights.
Team roles
Administrator and editor roles for teammates, within the user limit of your plan.
Encrypted everywhere
TLS in transit, encrypted storage, report data deleted when you delete the domain or the account.
Plans for 10 to 5,000 domains and IPs
Every plan includes 100+ blacklists, SPF, DKIM and DMARC monitoring and instant alerts. Yearly billing saves 50%.
Starter
For a business with a few sending domains.
$288 billed yearly, $49
Billed monthly, cancel anytime
- 10 domains and IPs monitored
- Checks every 60 minutes, re-check on demand
- 100+ blacklists, IP and domain
- SPF, DKIM, DMARC, MX, PTR, BIMI monitoring
- Email and Slack alerts
- DMARC reports, 50,000 messages a month
- Removal steps for every list
- 90 days of history, 1 user
Business
For brands and SaaS teams with many senders.
$888 billed yearly, $149
Billed monthly, cancel anytime
- 100 domains and IPs monitored
- Checks every 15 minutes
- Everything in Starter
- Webhook (HMAC signed) and Microsoft Teams alerts
- DMARC reports, 1,000,000 messages a month
- 1 year history, 5 users
Agency
For agencies managing client domains.
$2,988 billed yearly, $499
Billed monthly, cancel anytime
- 500 domains and IPs monitored
- Checks every 5 minutes
- Everything in Business
- Bulk import of domains and IPs
- DMARC reports, 5,000,000 messages a month
- 25 users with roles, 2 years history
Scale
For MSPs and high volume senders.
$8,988 billed yearly, $1,499
Billed monthly, cancel anytime
- 5,000 domains and IPs monitored
- Checks every 5 minutes
- Everything in Agency
- Signed webhooks into your own systems
- DMARC reports, 25,000,000 messages a month
- Unlimited users, 3 years history
All prices in USD. Card payment with 3D Secure. Upgrades charge the difference right away and take effect after payment.
Questions before you start
Anything else goes to [email protected] and gets a reply from a person.
How do I check if my domain or IP is blacklisted?
Type the domain, an email address or the IP into the box at the top of this page and press Check Now. We query 100+ IP and domain blacklists by DNS and show each result live, together with your SPF, DKIM and DMARC records.
Is the blacklist check free?
One check is free and needs no account. Creating an account unlocks the full report for that check once. Continuous monitoring, alerts and history are part of the paid plans, starting at $24 a month on yearly billing.
How often does monitoring run?
Every 60 minutes on Starter, every 15 minutes on Business and every 5 minutes on Agency and Scale. You can also re-check any domain or IP on demand from the dashboard.
How do alerts reach us?
By email and Slack on every plan, plus Microsoft Teams and signed webhooks on Business and higher. An alert names the list, the IP or domain, what the listing means and the steps to get removed.
What happens when we get listed?
You get an alert within minutes, the Domain Health score drops and the finding shows the exact removal steps for that list. When the list drops you, you get a second alert so you know the issue is closed.
Do you send email from our domain or need access to our mailboxes?
No. Blacklist and authentication checks run by DNS only. DMARC aggregate reports are files you upload to your workspace, and you can delete them at any time.
Can agencies monitor many client domains?
Yes. Agency covers 500 domains and IPs checked every 5 minutes, with bulk import, a label per batch and 25 users with roles. Scale covers 5,000.
Can we cancel or change plans?
Yes, from the billing page at any time. Moving up charges the difference right away, moving down applies at the next renewal, and cancelling keeps access until the end of the paid period.
Know the moment your domain gets blacklisted
Run a free check now, then keep every domain and IP you send from under watch.