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The Top 10 Worst

The World's Worst Spammers

Up to 80% of spam targeted at internet users around the world is generated by a hard-core group of around 100 known persistent spam gangs whose names, aliases and operations are documented in Spamhaus' Register Of Known Spam Operations (ROKSO) database.

This TOP 10 chart of ROKSO-listed spammers is based on Spamhaus views of the highest threat, least repentant, most persistent, and generally the worst of the career spammers causing the most damage on the internet currently.

Source: Register Of Known Spam Operations (ROKSO) database + Spamhaus Blocklist (SBL) database. Detailed records on each spammer or spam gang listed can be viewed by clicking on the names.
The 10 Worst Spammers
As of 30 November 2015 the world's worst spammers and spam gangs are:

Canadian Pharmacy - Ukraine
A long time running pharmacy spam operation. They send tens of millions of spams per day using botnet techniques. Probably based in Eastern Europe, Ukraine/Russia. Host spammed web sites on botnets and on bulletproof Chinese web hosting.

Dante Jimenez / Aiming Invest - United States
Spamwarez, lists, "bulletproof" hosting in the finest South Florida tradition. Working with worst cybercriminal botnet spammers. Now mostly involved in massive botnet spamming with hosting on hacked servers and Eastern European hosters.

Michael Lindsay - United States
Lindsay's iMedia Networks is a full-fledged spam-hosting operation serving bulletproof hosting at high premiums to well known ROKSO-listed spammers. His customers spam via botnet zombies with spam payloads hosted offshore, tunneled back to his servers. He and the gang have been hijacking (stealing) IP address space from companies for years to spam from. Illegal in the USA.

Yair Shalev / Kobeni Solutions - United States
High volume snowshoe spammer from Florida, (former?) partner-in-spam of ROKSO spammer Darrin Wohl. Son-in-law of ROKSO-listed spammer Dan Abramovich. Sued for fraud by the US FTC in 2014.

Mike Boehm and Associates - United States
Snowshoe spam organization that uses large numbers of inexpensive, automated VPS hosting IPs and domains in whatever TLD is currently cheapest to send high volumes of spam to extremely dirty, scraped lists. Operates under many business and individual names.

Yambo Financials - Ukraine
Huge spamhaus tied into distribution and billing for child, animal, and incest-porn, pirated software, and pharmaceuticals. Run their own merchant services (credit-card "collection" sites) set up as a fake "bank."

Michael Persaud - United States
Long time snowshoe type spammer.

Streamdirect TV a/k/a "Adober" gang - Canada
Spamming for many years. All fraud scam spam. Originally sold fake versions of Adobe/Skype, anti-virus programs, and other software, and unauthorized TV feeds. Have criminally hacked the accounts of ESPs and ESP customers to pump out their spam. Have serially abused cheap VPS servers from IPs at, which does not log connections and cannot trace abusers. Although a Canadian spam operation, they have a strong Russian influence.

Jagger Babuin / BHSI - Canada
Romanian spammer now living in Vancouver BC. Also known as the "Dr Oz" spammer.

Josh Henderson or Nicholson - - Canada
Offshore Bulletproof Hosting is his thing.

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