Suped

Summary

Being listed on UCEPROTECT can be a peculiar experience for senders. Unlike many other major blacklists (or blocklists), UCEPROTECT is often viewed with skepticism due to its unique, sometimes controversial, listing methodology. It operates across multiple levels, from individual IP addresses to entire network blocks, based on spam trap hits and other signals.

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Check your domain or IP against 144 blocklists.
www.spamhaus.org logoSpamhaus0spam.org logo0Spam
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Abusix
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Barracuda Networks
www.spamcop.net logoCisco
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Mailspike
www.nosolicitado.org logoNoSolicitado
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SURBL
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UCEPROTECT
uribl.com logoURIBL
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8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
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dan.me.uk
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DrMx
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DroneBL
rbl.efnetrbl.org logoEFnet
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Fabel
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GBUdb
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ImproWare
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JIPPG Technologies
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Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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Mail Baby
www.nordspam.com logoNordSpam
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nsZones
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Polspam
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RedHawk
rv-soft.info logoRV-SOFT Technology
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Schulte
www.scientificspam.net logoScientific Spam
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Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
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Taughannock Networks
www.team-cymru.com logoTeam Cymru
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Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
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Abusix
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Barracuda Networks
www.spamcop.net logoCisco
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Mailspike
www.nosolicitado.org logoNoSolicitado
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SURBL
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UCEPROTECT
uribl.com logoURIBL
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8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
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dan.me.uk
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DrMx
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DroneBL
rbl.efnetrbl.org logoEFnet
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Fabel
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GBUdb
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ImproWare
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JIPPG Technologies
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Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
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Mail Baby
www.nordspam.com logoNordSpam
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nsZones
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Polspam
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RedHawk
rv-soft.info logoRV-SOFT Technology
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Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
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Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
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Barracuda Networks
www.spamcop.net logoCisco
Blocklist icon
Mailspike
www.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
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UCEPROTECT
uribl.com logoURIBL
Blocklist icon
8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
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Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
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dan.me.uk
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DrMx
Blocklist icon
DroneBL
rbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Baby
www.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
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Barracuda Networks
www.spamcop.net logoCisco
Blocklist icon
Mailspike
www.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECT
uribl.com logoURIBL
Blocklist icon
8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBL
rbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Baby
www.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networks
www.spamcop.net logoCisco
Blocklist icon
Mailspike
www.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECT
uribl.com logoURIBL
Blocklist icon
8086 Consultancy
abuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.lt
dnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBL
rbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filter
www.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Baby
www.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawk
rv-soft.info logoRV-SOFT Technology
Blocklist icon
Schulte
www.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkey
psbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networks
www.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networks
senderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheft

What email marketers say

Email marketers often find themselves in a challenging position when an IP address is blacklisted by UCEPROTECT. Their primary concern isn't always the direct impact on email deliverability, but rather the panic it can cause among clients or internal teams who rely on general blacklist checking tools like MXToolbox. This creates a need to explain why UCEPROTECT listings may not be as critical as other blocklists, even when there's no clear reason for the listing, such as a lack of recent sending activity from the affected IP. Managing client expectations and understanding which blocklists genuinely affect deliverability is a key skill. You might want to consider whether UCEPROTECT L3 is worth worrying about, and how to rehabilitate sender reputation after any block.

Marketer view

Email marketer from Email Geeks indicates that an IP address being blacklisted by UCEPROTECT-Level1, even with no mail sent from that IP for at least 48 hours prior to the timestamp, is familiar. It suggests that there might be issues with timestamp accuracy or the way UCEPROTECT detects activity, leading to confusion for senders.

06 Jun 2020 - Email Geeks

Marketer view

Email marketer from help.contabo.com reports that UCEPROTECT has recently changed its listing policy, which has caused IP addresses from various networks, including Contabo, to be listed. This highlights that broad network listings can occur due to policy shifts, not just individual sending behavior.

20 May 2023 - help.contabo.com

What the experts say

Email deliverability experts generally hold a strong and consistent view regarding UCEPROTECT. They widely agree that UCEPROTECT operates outside the norms of legitimate, community-supported anti-spam efforts. The consensus is that UCEPROTECT's lists, especially at higher levels (L2 and L3), have minimal impact on actual email deliverability to major inbox providers because these providers do not use them for filtering. Experts advise against trying to communicate with UCEPROTECT's operators or paying for delisting, as these actions are often seen as futile or counterproductive. The focus should instead be on understanding broader email blocklists and how to contact ISPs to get off blacklists, rather than engaging with UCEPROTECT.

Expert view

Email expert from Email Geeks states there is no way to effectively communicate with the operators behind UCEPROTECT. They are perceived as being completely uninterested in maintaining a legitimate and collaborative blocklist service within the email ecosystem.

06 Jun 2020 - Email Geeks

Expert view

Email expert from Spamresource advises that UCEPROTECT operates with a unique, aggressive methodology. They often list entire network blocks based on a single trigger, which can disproportionately impact legitimate senders due to its broad nature.

15 Mar 2023 - Spamresource

What the documentation says

Official documentation and technical explanations concerning UCEPROTECT reveal its tiered system of IP blocklisting and its unique stance on email volume. UCEPROTECT differentiates between listings of individual IP addresses (Level 1) and increasingly larger network blocks (Levels 2 and 3), implying a progressive escalation based on the severity and pervasiveness of detected spam. A notable aspect often highlighted is their strong opinion on appropriate email sending volumes for end-users. This perspective underpins their aggressive blocklist approach, making it distinct from many other reputation systems. For a general understanding of how these listings can affect your sending, consider what happens when your IP gets blocklisted and exploring the different types of email blocklists.

Technical article

Documentation from UCEPROTECT states that their Level 1 list (UCEPROTECTL1) is primarily for single IP addresses that have directly sent unsolicited bulk email or engaged in other abusive activities. This listing is typically short-lived and self-removes after 7 days if no further abuse is detected.

12 Feb 2024 - UCEPROTECT website

Technical article

Documentation from UCEPROTECT explains that Level 2 (UCEPROTECTL2) listings target the /24 network subnet (a larger block of IPs) if multiple IPs within that subnet are listed at Level 1. This indicates a broader pattern of abuse originating from the network segment, suggesting issues beyond a single IP.

18 Jan 2024 - UCEPROTECT website

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