Cloud Server for Email
cloudserverforemail.com · infrastructure@cloudserverforemail.com · +372 602 3545
EU-Based Infrastructure
Operating Since 2015
Operating Since 2015
IP Blacklist Removal Guide
Removal Procedures for Major Email Blacklists
Version 2026-04 · Cloud Server for Email
Step 1: Identify All Active Listings
# Check multiple blacklists at once
# Tools: mxtoolbox.com/blacklists | multirbl.valli.org | whatismyipaddress.com/blacklist-check
# Check specific lists:
dig YOUR.IP.REVERSED.zen.spamhaus.org
# Example: for IP 203.0.113.1 → dig 1.113.0.203.zen.spamhaus.org
# Response of NXDOMAIN = not listed
# Response of 127.0.0.x = listed (x indicates list type)
Major Blacklists and Removal Procedures
| Blacklist | Severity | Removal URL | Wait Time |
|---|---|---|---|
| Spamhaus SBL | High — ISPs use this | spamhaus.org/zen/removal | Requires investigation; 24-72h |
| Spamhaus PBL | Medium — dynamic IP list | spamhaus.org/pbl/removal | Automatic; 24-48h |
| Spamhaus XBL | High — exploited systems | spamhaus.org/xbl/removal | Requires cleanup first |
| Barracuda BRBL | High | barracudacentral.org/rbl/removal | 24-48h after request |
| Invaluement ivmSIP | Medium | invaluement.com/lookup | Manual review; 48-72h |
| SORBS DUHL | Low-Medium | sorbs.net/lookup | 24-48h |
| SpamCop | Medium | Expires automatically in 24-72h | Automatic expiry |
| Microsoft MSBL | High | sendersupport.olc.protection.outlook.com | 48-72h after review |
Before Submitting Removal Requests
- Identify and fix the root cause (compromised server, spam operation, list quality issue)
- Implement suppression for all addresses that generated complaints
- Verify server is secure: check for open relays, malware, unauthorized access
- Implement proper authentication: SPF, DKIM, DMARC must all be passing
- Prepare a brief explanation of what caused the listing and what has been fixed
Removal Request Best Practices
- Be specific: Include IP address, when you believe the listing occurred, and exactly what you have fixed
- Be professional: Aggressive or impatient tone slows down manual review processes
- One request per listing: Multiple removal requests for the same IP slow down processing
- Follow up once: If no response in 5 business days, one polite follow-up is appropriate
- Document: Keep records of when listings occurred, root cause, and removal confirmation
After Removal: Prevention
- Daily blacklist monitoring configured (automated check of all sending IPs)
- List hygiene automated: hard bounces suppressed within 24h
- FBL enrollment active: complaints from ISPs processed and suppressed immediately
- Engagement-based sending: suppressing subscribers inactive for 180+ days
- Postmaster Tools and SNDS daily review instituted
Attempting to remove a listing before fixing the root cause will result in re-listing, often with a longer waiting period or permanent listing on some blacklists.
Cloud Server for Email handles blacklist removal for all managed infrastructure clients as part of incident response. Contact infrastructure@cloudserverforemail.com if your IPs are listed.