Free email blacklist check
Check your mail servers, or any IP, against 15 email blacklists, SpamCop and Barracuda included. If you’re listed, you’ll see where, and exactly how to get off.
Example result for yourcompany.com
Inboxes that use SpamCop and Barracuda may junk or refuse mail from this server until it’s removed.
How to fix it
Find and fix the cause first. Lists add servers that send spam. Usually that means a hacked account or website, a bought or old list, or a sudden jump in volume.
Ask SpamCop and Barracuda to remove 203.0.113.25. Use each list’s own removal page. Many lists also drop entries on their own a few days after the spam stops. Never pay for removal.
Check where your email lands now. Once you’re removed, send a test to see whether Gmail, Outlook and Yahoo put you in the inbox or in spam.
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Mail servers checked
| Address | What it is | Result |
|---|---|---|
203.0.113.25 | Sending server in your SPF record | Listed on 2SpamCop, Barracuda |
198.51.100.10 | Inbox server mx1.yourcompany.com | Clean |
The 15 lists we check
Spamhaus isn’t included.
Inboxes use blacklists to spot servers that send spam. How much a listing hurts depends on whose server it is.
Your own server or IP
If you send from your own server or a dedicated IP, a listing on SpamCop or Barracuda can send your mail straight to spam.
Google Workspace or Microsoft 365
You share their servers, and they deal with listings themselves. Your domain’s reputation, SPF, DKIM and DMARC matter more.
01
Look for a hacked account, a compromised website form, a bought or old list, or a sudden jump in volume. Fix it before anything else.
02
Use each list’s own removal page, linked from your result. Many lists clear entries on their own once the spam stops.
03
Warm up new inboxes slowly, clean your list, and check where your email lands before you ramp up again.
A public list of server addresses caught sending spam. Inboxes look up the sending server on these lists and may junk or refuse its mail if it’s listed.
Usually a hacked account or website, a bought or old email list with spam traps, or a sudden jump in volume. On shared hosting, another customer on the same server can cause it too.
Some lists, like SpamCop, drop entries on their own within a day or two of the spam stopping. Others need a removal request and take from hours to about a week.
No. Every list we check offers free removal. Paid express delisting only skips a wait, and it doesn’t help if the cause is still there.
Step-by-step fix guides: How to get off an email blacklist · Microsoft SNDS · How to run an inbox placement test
