You’re on a blacklist. Your mail isn’t being filtered
For affected providers, every message bounces before it reaches a single inbox: campaigns, invoices, password resets, order confirmations. Every day your domain or IPs are listed, the underlying damage to your reputation deepens. In short, the longer you wait, the more difficult it will be to reach the inbox again.
Read the bounce
A hard bounce naming an operator (550 or 554) means a listing. No bounce, a ~99% delivery rate, and collapsing opens mean reputation damage, not a listing.

Check three things, not one
Your sending domain, every sending IP, and your click-tracking and link domains within a blacklist monitoring tool. Senders routinely delist their IP addresses and remain blocked because the listing is actually on their tracking domain.
Time to recover
Days to weeks for the removal itself, then 2 to 6 weeks to rebuild the underlying reputation, and that window grows by 1 week for every week you stay listed.

You got a blacklist warning
Bounce naming Spamhaus, Barracuda
A listing isn’t typically definitive
Usually, a listing becomes visible when your reputation with mailbox providers has been quietly degrading for months due to complaints, spam traps, bounces, and spam-like behavior.
01
Spam traps in your list
Recycled and pristine traps are the strongest trigger; one hit can list you. Purchased, scraped, aged, or inherited lists are the fastest route to them.
02
Spam complaints above threshold
The heaviest negative signal there is compounds daily until the source is identified.
03
No list hygiene or sunset policy
Bounces to dead addresses and dormant contacts tell providers nobody wants your mail.
04
Broken or misaligned authentication
Without aligned SPF, DKIM, and DMARC, operators can’t separate your mail from mail forged in your name.
05
Volume spikes without warm-up
A jump with no sending history matches the snowshoe pattern that operators actively hunt.
06
Shared IP with bad neighbors
Another sender’s abuse gets your mail rejected, too, and you can’t fix their behavior.
07
Listed link or tracking domain
A shortener or click-tracking domain on a DBL taints every message you send, regardless of your own domain deliverability scores.
08
Compromised account, unprotected form, or spoofed domain
Abuse sent through, or in the name of, your infrastructure lands on you and never appears in your ESP.
Not all blacklists are equal
Some are prominent and will lead to bounces and messages being rejected almost immediately, while others are more minor and will not affect you. Truthfully, some blacklists are outright frauds – listing entire IP ranges or newly purchased domains, for no real reason. The one you should care about will usually lead to bounce-back emails, deliverability issues, or even URL access troubles.
How MailSoar gets you from spam back to the inbox
When your IP or domain is blacklisted, most clients start by diagnosing and fixing the root cause. Explore our complete deliverability consulting offer below.
Find
Pinpoint exactly what’s breaking your deliverability — before spending a euro on fixes.
Fix
Roll out the technical and content fixes — DNS, warmup, infrastructure — that get your emails back in the inbox.

Grow
Turn stable inbox placement into real growth, with engagement and revenue tracked send by send.
Run
Keep a senior expert watching your reputation, so issues get caught and fixed before they cost you inbox placement.
Get the right steps to get delisted
Find out if your domain or IP is on a blacklist, identify the root cause, and get expert guidance to get delisted and restore your sender reputation. Book a free call to solve the issue fast.
From blacklisted to back in the inbox
What our experts did, and the results that followed.
Is your situation slightly different?
A listing often overlaps with these closely related problems.
Domain or IP blacklisted:
FAQ
Ready to fix your Deliverability?
One 30 minutes call. No sales pitch. A senior consultant on the line.





