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Thunderbird Feed List | data4marketers.com | 2022-11-25 | 6.29M People
by thelastwhitehat - Sunday January 18, 2026 at 11:45 PM
#1
[Image: Email.png]

Description:
On November 25, 2022, the now-defunct and infamous data broker Data4Marketers (data4marketers.com) experienced a partial leak of its paid "Thunderbird Feed." This resulted in the compromise of approximately 6,296,307 records dating from November 2021 to June 2022. While the data was initially kept private, it was later shared on BFv1 by @/Fuckery in early January 2023. The leak consists of 387 CSV files, totaling 1.82 GB uncompressed, and includes roughly 5,731,507 unique email addresses. This dataset is unrelated to the Special K Data Feed Spam List, which also originated from Data4Marketers.

Compromised Data:
Full names, Email addresses, Physical addresses, Phone numbers, IP addresses, Dates of Birth, Genders, Driver’s licenses, Military statuses, Employment information, Income statuses, and much more.

Samples:
Spoiler Spoiler




Downloads:
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#2
Ah, I remember when I got a copy of this a few years back. I labelled it "ThunderbirdFeed_SupposedlyNov2021-Jun2022_ScrapedFrom_Data4Marketers.com_ButBadData.7z". Note that they were scammers (and/or bought data from scammers)... in the leads industry the typical scam is to take old data, and either update the dates, or go for the gold by adding fake data (like here with the SSNs, all of them are made up, saying stuff came from a source it did not, etc.).

Typically the name/address/phone/email are all what was originally entered (mostly 2006-2011), so "old but gold" as some would say.
#3
(Jan 19, 2026, 12:28 AM)ThinkingOne Wrote: Ah, I remember when I got a copy of this a few years back. I labelled it "ThunderbirdFeed_SupposedlyNov2021-Jun2022_ScrapedFrom_Data4Marketers.com_ButBadData.7z". Note that they were scammers (and/or bought data from scammers)... in the leads industry the typical scam is to take old data, and either update the dates, or go for the gold by adding fake data (like here with the SSNs, all of them are made up, saying stuff came from a source it did not, etc.).

Typically the name/address/phone/email are all what was originally entered (mostly 2006-2011), so "old but gold" as some would say.

Thanks for adding more context. I wasn’t able to find much online beyond what was provided in the original thread. Even the website archives didn’t help much, but I do remember seeing the original page listing the data for sale when I first got this data.

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#4
It seems I saw someone post the same content a while ago.
#5
Thank you very much!

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#6
(Jan 19, 2026, 12:28 AM)ThinkingOne Wrote: Ah, I remember when I got a copy of this a few years back. I labelled it "ThunderbirdFeed_SupposedlyNov2021-Jun2022_ScrapedFrom_Data4Marketers.com_ButBadData.7z". Note that they were scammers (and/or bought data from scammers)... in the leads industry the typical scam is to take old data, and either update the dates, or go for the gold by adding fake data (like here with the SSNs, all of them are made up, saying stuff came from a source it did not, etc.).

Typically the name/address/phone/email are all what was originally entered (mostly 2006-2011), so "old but gold" as some would say.

`Old but gold`, but if data is more than 20 years old, it is more `old but copper`, many PII might be deprecated.
Moreover, I did not find any leak disclosure for Thunderbird Data4Marketer outside the SpecialK data feed.
If someone has any details about this scrape, a little thread update would be great.
#7
(Jan 18, 2026, 11:45 PM)thelastwhitehat Wrote:
[Image: Email.png]

Description:
On November 25, 2022, the now-defunct and infamous data broker Data4Marketers (data4marketers.com) experienced a partial leak of its paid "Thunderbird Feed." This resulted in the compromise of approximately 6,296,307 records dating from November 2021 to June 2022. While the data was initially kept private, it was later shared on BFv1 by @/Fuckery in early January 2023. The leak consists of 387 CSV files, totaling 1.82 GB uncompressed, and includes roughly 5,731,507 unique email addresses. This dataset is unrelated to the Special K Data Feed Spam List, which also originated from Data4Marketers.

Compromised Data:
Full names, Email addresses, Physical addresses, Phone numbers, IP addresses, Dates of Birth, Genders, Driver’s licenses, Military statuses, Employment information, Income statuses, and much more.

Samples:
Spoiler Spoiler




Downloads:

thx
#8
(Jan 18, 2026, 11:45 PM)thelastwhitehat Wrote:
[Image: Email.png]

Description:
On November 25, 2022, the now-defunct and infamous data broker Data4Marketers (data4marketers.com) experienced a partial leak of its paid "Thunderbird Feed." This resulted in the compromise of approximately 6,296,307 records dating from November 2021 to June 2022. While the data was initially kept private, it was later shared on BFv1 by @/Fuckery in early January 2023. The leak consists of 387 CSV files, totaling 1.82 GB uncompressed, and includes roughly 5,731,507 unique email addresses. This dataset is unrelated to the Special K Data Feed Spam List, which also originated from Data4Marketers.

Compromised Data:
Full names, Email addresses, Physical addresses, Phone numbers, IP addresses, Dates of Birth, Genders, Driver’s licenses, Military statuses, Employment information, Income statuses, and much more.

Samples:
Spoiler Spoiler




Downloads:
#9
damn real blast from the past, thx for this
#10
Let me check.thanks for you info


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