Errors
Your Sending IP Is Blacklisted — How to Get Delisted
Blocklists flag IPs that sent spam. Receivers may reject mail before SPF/DKIM. Fix the root cause — then request removal.
How to see which lists you’re on
Run DomainPreflight Email with your sending IP — Spamhaus, SpamCop, Barracuda, and more in one pass.
Why IPs get listed
- Compromised server blasting spam
- High bounces
- Spam trap hits
- Sudden volume spike
- Shared IP with a bad neighbor
Delisting quick refs
Spamhaus: spamhaus.org/removal — fix first, then request.
SpamCop: often auto-expires 24–48h after spam stops.
Barracuda: barracudacentral.org/lookups → request removal.
Fix it step by step
Check your IP against blocklists
FAQ
How do I know if my IP is blacklisted?
Run DomainPreflight Email with your sending IP — we check many major lists at once.
How long does delisting take?
Spamhaus often 24–48h after request. SpamCop can auto-expire in 24–48h. Barracuda often 12–24h — varies by list.
Can I send while blacklisted?
Some mail still slips through — not every receiver checks every list. Fix it anyway.
I didn’t send spam — why am I listed?
Often a compromised account, bad script, shared IP, or a neighbor on shared hosting.
Will delisting fix spam folder issues?
Yes if the list was the main driver. If not, check PTR, DMARC, and content next.