ImproWare Swinog Spam URIBL
ImproWare Swinog Spam URIBL is a domain-based blocklist (or blacklist) of domains found in spam emails, operated by the Swiss company ImproWare.
Updated on 17 Jun 2026: We updated the guide to correct the URIBL scope, add the uribl.swinog.ch lookup workflow, and clarify delisting steps.
Summarize with
Check if you are listed on ImproWare Swinog Spam URIBL
And 143 other blocklists.
Spamhaus
0Spam
Cisco
NoSolicitado
URIBL
abuse.ro
ALPHANET
Anonmails
Ascams
BLOCKEDSERVERS
Calivent Networks
EFnet
JustSpam
Kempt.net
NordSpam
RV-SOFT Technology
Scientific Spam
Spamikaze
SpamRATS
SPFBL
Suomispam
System 5 Hosting
Team Cymru
Validity
www.blocklist.de Fail2Ban-Reporting Service
ZapBL
2stepback.dk
Fayntic Services
ORB UK
technoirc.org
TechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftSpamhaus0SpamCiscoNoSolicitadoURIBLabuse.roALPHANETAnonmailsAscamsBLOCKEDSERVERSCalivent NetworksEFnetJustSpamKempt.netNordSpamRV-SOFT TechnologyScientific SpamSpamikazeSpamRATSSPFBLSuomispamSystem 5 HostingTeam CymruValiditywww.blocklist.de Fail2Ban-Reporting ServiceZapBL2stepback.dkFayntic ServicesORB UKtechnoirc.orgTechTheftWhat is ImproWare Swinog Spam URIBL?
The ImproWare Swinog Spam URIBL is a domain-based blocklist (or blacklist) that lists domains and URIs found inside spam emails. It is queried through DNS at uribl.swinog.ch and is different from an IP DNSBL because it checks links in message content, not the server IP that sent the message.
ImproWare also publishes IP-based DNSBL services, but this Swinog URIBL is specifically for domains appearing in spam. Mail systems use it as one signal in a layered spam-filtering setup, often alongside IP reputation, content filtering, SPF, DKIM, and DMARC checks.
Who runs ImproWare Swinog Spam URIBL?
This blocklist is operated by ImproWare AG, an IT and telecommunications company based in Pratteln, Switzerland.
ImproWare's public antispam page lists three Swinog services: dnsrbl.swinog.ch, spamrbl.swinog.ch, and uribl.swinog.ch. That distinction matters because the first two relate to IP-based reputation, while ImproWare Swinog Spam URIBL relates to domains and URIs found in spam.
How ImproWare Swinog Spam URIBL works
When spam reaches a spamtrap, URLs are extracted, checked against a whitelist, and added to the URIBL when they match the list's policy. A recipient mail system can query the domain portion of a URL against uribl.swinog.ch and use a positive DNS response to score, quarantine, tag, or reject the message.
A listing points to a domain seen in spam content. It does not prove that the domain's mail server sent the spam, but it does mean the domain appeared in unwanted mail and needs investigation.
How do I get removed and delisted from ImproWare Swinog Spam URIBL?
ImproWare provides a removal process through its antispam page. Before you request delisting from this blocklist (blacklist), identify whether the listing is for a sending IP in one of ImproWare's IP lists or a URI or domain in uribl.swinog.ch. For the URIBL, investigate the domain or URL found in spam, not only the mail server that sent the message.
Common causes include compromised websites, abused tracking domains, redirect chains, hacked CMS pages, user-generated links, and marketing links used by unauthorized senders. Fix the source of the spam before submitting a removal request, otherwise the domain can be listed again.
Suped's DMARC reporting helps administrators confirm whether unauthorized senders are using a domain while they investigate a URIBL listing.
Once you have fixed the source of the spam, you can request removal. ImproWare outlines these guidelines for delisting:
- Use the removal process only if you administer the affected mail system or domain. Ordinary mailbox users should contact their provider or domain administrator.
- ImproWare states that removals for its DNSBL services are free.
- Most removal requests are processed within 48 hours.
- ImproWare allows one removal request for the same IP address per week. For URI or domain listings, avoid repeated requests until the abuse source has been fixed.
Use the URI check on the ImproWare antispam page for uribl.swinog.ch listings, and use the IPv4 check only when the issue is an IP-based ImproWare list.
What's the impact of being listed on ImproWare Swinog Spam URIBL?
The impact of being listed on the ImproWare Swinog Spam URIBL is usually narrower than a listing on a heavily used global blocklist or blacklist, because adoption is not universal. Still, networks that query uribl.swinog.ch can tag or reject messages that contain a listed domain, even when the sending IP is clean.
This can affect newsletters, password resets, invoices, and transactional mail if they include the listed domain in links or tracking URLs. Treat the listing as a signal to review web security, link hygiene, suppression practices, and authentication data rather than only requesting removal.
