UCEProtect Level 3 — Check, Delist & Monitor
Check if you're listed on UCEProtect Level 3. Lists entire ASNs (hosting providers). A Level 3 listing does not mean your server sent spam. No legitimate provider uses this list.
Impact & Usage
No legitimate mail provider uses UCEProtect Level 3. It lists entire hosting providers and ISPs by ASN. A listing here has zero practical impact on email delivery.
Typical users: No legitimate mail providers use Level 3; it is universally regarded as unreliable and extortionary by the email operations community
Check If You're Listed
Run a blacklist check against UCEProtect Level 3 right now.
Check UCEProtect Level 3What Gets You Listed
Entire ASN listed when aggregate abuse from the ISP/hosting provider exceeds thresholds; individual server operators are collateral damage
How to Get Delisted
- Check your listing at uceprotect.net/en/rblcheck.php by entering your IP address.
- Understand that Level 3 lists your entire ASN (autonomous system) — your hosting provider or ISP as a whole. This has nothing to do with your individual server's behavior.
- There is nothing you can do as an individual IP owner to resolve a Level 3 listing. It reflects UCEProtect's assessment of your hosting provider's overall network.
- Wait for the listing to auto-expire after 7 days. Do not pay the 250 EUR express removal fee. Verify status with mxio Blacklist Check.
Expected Timeline
7 days (automatic) or instant (250 EUR per ASN — do not pay)
Auto-delist: Automatic removal after 7 days; express delisting for 250 EUR per ASN — widely criticized as extortionary and punitive toward innocent customers
Common Causes
- Multiple /24 ranges within your hosting provider's ASN were listed on Level 2, triggering automatic escalation to Level 3
- Your hosting provider or ISP has a large number of Level 1 individual IP listings across their network
- Large cloud providers (AWS, Azure, GCP, DigitalOcean) are frequently listed on Level 3 due to the sheer volume of IPs in their ASNs
Prevention Tips
- Do not pay for UCEProtect Level 3 express removal — no legitimate mail provider references this list
- A Level 3 listing is not actionable at the individual server level — it reflects your hosting provider's network, not your server
- Focus your monitoring and remediation effort on blacklists with real delivery impact
- If UCEProtect Level 3 causes you anxiety, understand that major cloud providers like AWS and Azure are frequently listed here with no consequence
Overview
UCEProtect Level 3 lists entire autonomous systems (ASNs) — the network-level identity of your hosting provider or ISP. A Level 3 listing means UCEProtect has decided that enough of your provider's IP space is problematic to blacklist the entire organization. This is the broadest and most indiscriminate level of the UCEProtect system, and it is the level with the least real-world relevance.
To be direct: no legitimate mail provider uses UCEProtect Level 3. Not Gmail, not Microsoft 365, not Yahoo, not Proofpoint, not Mimecast, not Barracuda, not MailRoute. The list routinely includes major cloud providers like AWS, Azure, Google Cloud, and DigitalOcean — if any significant mail provider referenced Level 3, it would block email from a substantial portion of the internet. Nobody does.
UCEProtect offers "express removal" for 250 EUR per ASN. Do not pay this fee. There is no legitimate reason to spend money removing a listing that has no impact on email delivery. The express removal pricing at the ASN level — covering potentially millions of IP addresses — underscores the extractive nature of this model. It is not a serious anti-spam tool at this level; it is a fee schedule.
If you see a UCEProtect Level 3 listing in your monitoring dashboard, the correct response is to note it and move on. There is nothing you can do as an individual server operator to influence your hosting provider's ASN-level listing, and there is no reason to try. The listing auto-expires after 7 days, and even if it persists, it will not affect your email delivery.
Your time is better spent on any other blacklist. A Spamhaus SBL listing is an emergency. A Barracuda listing requires immediate attention. A UCEProtect Level 3 listing requires a calm acknowledgment that this list exists and a redirect of your attention to things that matter.
Monitor Your Blacklist Status
Get alerted the moment your IP or domain appears on a blacklist. Catch listings early, before they impact deliverability.
Set Up MonitoringRelated Blacklists
Check if you're listed on UCEProtect. Listings auto-expire in 7 days, or pay 50 EUR for instant removal. Most major providers ignore this list entirely.
Check if you're listed on UCEProtect Level 2. Lists entire /24 IP ranges — a Level 2 listing does not mean your server sent spam. Auto-delists after 7 days.