The Passive Spam Block List (PSBL) lists IP addresses that hit its network of spam traps. It is comparatively conservative and offers a simple self-service removal form, making it one of the easier reputable lists to get off.
Why an IP gets listed on PSBL (Passive Spam Block List)
Blocklists add an IP when they see evidence of spam or abuse from it: mail hitting spam traps, a compromised server sending on behalf of a botnet, an open relay or proxy, or a sudden spike in unsolicited mail. Shared hosting and cloud IPs can also inherit a bad reputation from a previous tenant. It is used by a substantial number of mail servers, so a listing can measurably reduce delivery to those systems.
How to delist from PSBL (Passive Spam Block List)
To delist from PSBL (Passive Spam Block List): first fix the underlying cause (secure the host, stop the offending mail, close any open relay or proxy), then submit a removal request through the official form:
Delisting only sticks if the root cause is fixed first. Run the full Mail Health Report to catch the SPF, DKIM, DMARC or reverse-DNS problems that often cause listings.
Frequently asked questions
How do I check if my IP is on PSBL (Passive Spam Block List)?
Enter your mail server's IP address (or your domain) in the checker above. It queries PSBL (Passive Spam Block List) live and tells you immediately whether the IP is listed, along with how many other blocklists list it.
How long does it take to get delisted from PSBL (Passive Spam Block List)?
Once you have fixed the underlying issue and submitted the removal request, PSBL (Passive Spam Block List) typically processes delisting within a few hours to a few days.
Will a PSBL (Passive Spam Block List) listing stop my email being delivered?
It is used by a substantial number of mail servers, so a listing can measurably reduce delivery to those systems.