Why domains typically get listed
SURBL lists domains that show up in spam collected by spam traps and honeypots.
Phishing pages and malware download links are a common cause of listing.
A compromised website added to a spam campaign's email body can get listed too.
URL shorteners and redirect services sometimes get listed if spammers abuse them heavily.
Shared hosting is a frequent trigger, since one abusive tenant's domain can affect the platform's reputation.
Marketing and transactional senders can get caught up if their links get reused in unrelated spam runs.
How to check if you're listed
Use SURBL's own lookup page to search your domain directly.
You can also run a manual DNS query against multi.surbl.org for the domain in question.
Third-party multi-blacklist checkers can confirm a SURBL hit alongside other DNSBLs in one pass.
Always check the domains in your links, not just your sending IP address.
A clean IP reputation does not rule out a SURBL listing on a linked domain.
How to get removed
Start by identifying the exact listing at SURBL's lookup page, since sub-lists differ by data source.
Remove or clean up the flagged content on the listed domain.
Secure the site if it was compromised, including patching software and resetting credentials.
Stop any campaign or list practice that put spam-linked URLs into your messages.
Document what you fixed, including dates and what changed.
SURBL is run by volunteers, so a request with no evidence tends to get deprioritized.
Submit your removal request through SURBL's contact or delisting channel, referencing the exact sub-list and domain.
SURBL's own discussion archives show removal requests handled through a whitelist-focused contact.
Response speed on that channel can vary, so patience helps.
How long it typically takes
SURBL is a volunteer-run project without a formal support desk or guaranteed response time.
Independent reporting suggests allowing at least 24 to 48 hours after submission for the lookup to update.
A thin request, one with no evidence or dates, tends to slow things down further.
If a request gets denied, address the specific reason given rather than resubmitting the same text.
Appeals get accepted, but generally only once the underlying cause is genuinely fixed.
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FAQ
How do I check if my domain is on SURBL's blacklist?
Use SURBL's own lookup tool and search your domain directly. You can also query multi.surbl.org manually with a DNS lookup command. Third-party multi-blacklist checkers will show a SURBL result alongside other DNSBLs. Check any domain used in your email links, not only your sending IP.
How do I remove my IP from SURBL?
SURBL is a domain and URL blacklist, so it generally does not list plain IP addresses on its own. If you're bouncing, the actual trigger is usually a domain used in a link within the message. Identify that domain at SURBL's lookup page, fix the underlying content issue, and submit a documented removal request.
Does SURBL monitor sending IP reputation?
No, SURBL focuses on URLs and domains found inside message content, not the server that sent it. A server with a strong sending reputation can still trigger SURBL if it links to a flagged domain. This is a key difference from traditional IP-based blacklists.
What's the difference between multi.surbl.org and other SURBL lists?
multi.surbl.org combines several underlying data sources into a single lookup. Most modern mail filters, including current SpamAssassin versions, query multi.surbl.org instead of older individual sub-lists. Checking multi.surbl.org is generally the fastest way to see if any SURBL data source has flagged a domain.
How long does a SURBL delisting take once submitted?
There is no published fixed turnaround time, since SURBL is run by volunteers. Some reporting points to at least 24 to 48 hours for a successful delisting to show up in the lookup. A well-documented request with clear evidence tends to move faster than a vague one. Expect longer waits during periods of high request volume.
