The letter followed media reports accusing Gmail of disproportionately flagging messages from the GOP fundraising platform WinRed and sending them to the spam folder. Koli-Lõks taps into real-time intelligence about daily spam volumes by monitoring large numbers of “spamtraps” — email addresses that are intentionally set up to catch unsolicited emails. Tossavainen told KrebsOnSecurity that WinRed’s emails hit its spamtraps in the .com, .net, and .org space far more frequently than do fundraising emails sent by ActBlue. Koli-Lõks published a graph of the stark disparity in spamtrap activity for WinRed versus ActBlue, showing a nearly fourfold increase in spamtrap hits from WinRed emails in the final week of July 2025. Dijkxhoorn said their spamtrap data mirrors that of Koli-Lõks, and shows that WinRed has consistently been far more aggressive in sending email than ActBlue.