Cold Email Pipeline in Python: 1,320 Leads Scored, Inbox-Tested
Zakaria MAMOUMI
The problem
Outreach was going nowhere: mail landing in spam, lists full of addresses nobody had qualified, and no way to tell who was actually interested.
What I built
The whole pipeline in Python, on my own server.
SPF, DKIM and DMARC on dedicated sending domains
Lead collection and enrichment, then a scoring engine that rates every lead on fit, intent and engagement and sorts them into priority tiers
Isolated sequences on scheduled jobs, with click tracking synced into the CRM
The result
1,320 leads scored automatically, 154 surfaced as hot
Every click lands in the CRM already tagged
Inbox placement tested and confirmed, not assumed
Stack: Python, SMTP / Postfix, SPF, DKIM, DMARC, FluentCRM, cron, Linux VPS.
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Posted Oct 17, 2026
Python outreach pipeline on my own server: SPF/DKIM/DMARC, lead scoring, CRM click sync. 1,320 leads scored, 154 hot, inbox placement tested.
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