Cold Email Daily

Haren drops warmup, spintax and AI personalization

Taylor Haren says his new infrastructure provider told him the deliverability meta is backwards, and he has stopped using warmup, spintax and AI personalization in favour of HTML marketing-style email. He says every client moved over gained at least 30% on signups and meetings.

Landing in the inbox

Haren drops warmup, spintax and AI personalization after infra briefing

Taylor Haren says a provider sending a trillion emails a week told him the cold email deliverability meta is backwards, and he has changed how he sends. Out: AI personalization, spintax, warmup, reply-based CTAs. In: basic merge fields and full HTML with images and booking links, because Google already knows a cold email has a CTA in it.

Taylor Haren
@THArrowOfApollo
X
every client we moved from Instantly to Halo had a minimum 30% uplift in sign-ups, meetings booked, and paying customers, and the best client had a 5.1x multiplier
Oct 17, 2026 · View on X

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Campaigns and numbers

Abraham posts three warm emails for no-shows, closed-lost and partners

Nick Abraham published three short warm-list emails and the process to build the lists. The no-show line: "Hey {first name}, I know you booked a call with us before, but we never got a chance to speak. Not sure if you found a partner for X, happy to reconnect." He says export no-shows and closed-lost every quarter, excluding current customers.

Nick Abraham
@NickAbraham12
X
Put your best adjacent provider into DiscoLike, pull every company like them, and find the people in Clay.
Oct 17, 2026 · View on X

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Workflows and tooling

Christian says an in-house Slack agent now builds most client lists

Christian says his team built an AI agent called Hermes that sources, enriches, validates and researches accounts when anyone messages it in Slack, and it now builds lists for almost all clients. He published a writeup covering what it connects to, how to phrase a request, the lists he says Clay cannot build, and where Claude Code takes over.

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