An open, community-maintained filter list that identifies cold-outreach sending platforms (Instantly, Smartlead, Apollo, and more) from email headers. EasyList, but for cold email.

anti-spam apps-script cold-email cold-email-outreach cold-emails cold-outreach email-filtering email-headers email-security filter-list gmail spam-detection
4 Open Issues Need Help Last updated: Aug 14, 2026

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help wanted good first issue

An open, community-maintained filter list that identifies cold-outreach sending platforms (Instantly, Smartlead, Apollo, and more) from email headers. EasyList, but for cold email.

JavaScript
#anti-spam#apps-script#cold-email#cold-email-outreach#cold-emails#cold-outreach#email-filtering#email-headers#email-security#filter-list#gmail#spam-detection
good first issue

An open, community-maintained filter list that identifies cold-outreach sending platforms (Instantly, Smartlead, Apollo, and more) from email headers. EasyList, but for cold email.

JavaScript
#anti-spam#apps-script#cold-email#cold-email-outreach#cold-emails#cold-outreach#email-filtering#email-headers#email-security#filter-list#gmail#spam-detection
good first issue

An open, community-maintained filter list that identifies cold-outreach sending platforms (Instantly, Smartlead, Apollo, and more) from email headers. EasyList, but for cold email.

JavaScript
#anti-spam#apps-script#cold-email#cold-email-outreach#cold-emails#cold-outreach#email-filtering#email-headers#email-security#filter-list#gmail#spam-detection

An open, community-maintained filter list that identifies cold-outreach sending platforms (Instantly, Smartlead, Apollo, and more) from email headers. EasyList, but for cold email.

JavaScript
#anti-spam#apps-script#cold-email#cold-email-outreach#cold-emails#cold-outreach#email-filtering#email-headers#email-security#filter-list#gmail#spam-detection