Everything we've learned about B2B outbound, free.
Guides, playbooks, and operational references for founders building outbound from zero. Written by the team that runs it for a living.
Pick a starting point.
Three doors in — by role, by what you need this week, or by the numbers.
I'm a founder. Where do I start?
Curated reading paths by stage — pre-seed through Series A. Each path is sequenced so you can follow it in order.
I need to send cold email this week.
The complete email infrastructure setup — domains, authentication, warmup, and the operational rules that keep mail landing.
Show me the math.
Free calculators for inbox volume, LinkedIn reach, multi-channel campaigns, and conference meeting density.
Nine topic areas. Read in order, or jump to one guide.
Each topic is a multi-guide reference, sequenced so you can read it in order to stand up that part of the motion — or jump straight to a single guide.
Cold Email Infrastructure
14 chapters on the authentication, isolation, warmup, and monitoring stack behind primary-tab placement.
LinkedIn Outreach Infrastructure
8 chapters on account architecture, detection, proxies, limits, warmup, messaging, automation, and compliance.
Conference Strategy
8 chapters on the pre/during/post architecture — strategy, VIP dinners, conversation engineering, follow-up.
Domains and Mailboxes
7 chapters on procurement, registrar selection, DNS hosting, and Google vs Microsoft mailbox economics.
Cold Copy and Campaign Architecture
9 chapters on principles, subject lines, CTAs, personalization, sequencing, phone, and multi-channel orchestration.
ICP and List-Building
8 chapters on closed-won deconstruction, first-party signals, prospect graphs, intent data, and operational list management.
Reply Handling and Pipeline Conversion
7 chapters on classification, routing, triage, objection handling, meeting booking, nurture, and pipeline math.
Design Partners (YC Pre-PMF)
6 chapters on recruiting, structuring, running, and converting design partner programs. The YC pre-PMF motion.
Sales Motion — Discovery to First AE
7 chapters on discovery call architecture, qualification, demos, multi-thread, proposals, and the founder-to-AE transition.
Most-read.
The guides that come up most often when founders ask “where do I start?”
Inbox warmup, demystified
Why 2-3 weeks isn't optional, and why volume-based warmup is now detected.
What makes cold copy good
Four principles, with good vs bad examples annotated side by side.
Why the founder's LinkedIn never runs cold outbound
The single most damaging LinkedIn mistake, and the multi-account fix.
When the design partner motion fits
The YC pre-PMF playbook — when it works, when it's theater.
Conference follow-up — the 24-hour window
Why bespoke follow-up converts at 25-40% and templated converts at 0-3%.
The 30-minute discovery call frame
Opening, context, discovery, proof, next step — the structure that doubles advancement rate.
Search, filter, sort.
Search by topic. Filter by topic area, company stage, or channel.
SPF — Sender Policy Framework and the 10-Lookup Failure Mode
RFC 7208 in depth. The 10-DNS-lookup limit, qualifier semantics, include-chain auditing, flattening tradeoffs.
DKIM — Selectors, Key Rotation, and the Canonicalization Trap
RFC 6376 — selectors, key length, canonicalization modes, third-party signing alignment, dual-publish rotation.
DMARC — Policy, Reporting, and the p=reject Failure Mode
RFC 7489. Policy escalation, alignment modes, aggregate vs forensic reports, subdomain inheritance.
MTA-STS and TLS-RPT — Enforced Transport Security
RFC 8461 / 8460. The downgrade attack, policy hosting, DANE alternative, M365 inbound connector bypass.
BIMI and VMC — Brand Indicators and Trademark Economics
IETF Draft. SVG-Tiny constraints, VMC certificate economics, mailbox provider support, when it's worth $1,500.
ARC — Authenticated Received Chain and the Forwarder Failure Mode
RFC 8617. Forwarder breakage, the three ARC headers, chain validation, the p=reject deployment dependency.
Subdomain Architecture — The Reputation Firewall
Sending-tier vs corporate-tier isolation. 32-domain math for 30 reps. The founder-burns-corporate-primary failure mode.
Domain Age and WHOIS — The Reputation Cold-Start Curve
The 90-day Gmail burn-in, TLD reputation differential, aged-domain marketplaces, blocklist due-diligence.
Inbox Warmup — Engagement Curves and Synthetic-Warmup Detection
The 21-28 day ramp, engagement-vs-volume scoring, why synthetic warmup is now detectable.
Bulk Sender Requirements — Gmail/Yahoo Feb 2024 Enforcement
The 5000/day threshold, one-click unsubscribe (RFC 8058), the 0.3% complaint ceiling, TLS requirements.
Postmaster Tools and SNDS — The Reputation Dashboards
Gmail Postmaster's 4 reputation buckets, Microsoft SNDS color bands, JMRP feedback, the 4-source monitoring picture.
Bounce Taxonomy — SMTP Codes and the 3% Threshold
RFC 5321/3463. Hard vs soft vs deferral, autoresponder misclassification, suppression discipline.
Seed List Inbox-Placement Testing — Methodology
100-200 seed addresses across providers, placement matrix, the seeds-vs-reality 5-15% gap.
Reply Detection — Threading, Message-IDs, and False Bounces
RFC 5322 threading headers, In-Reply-To/References, auto-responder detection (RFC 3834), forwarded threads.
LinkedIn Account Architecture — Why the Founder's Account Never Runs Cold Outbound
Multi-account pyramid, profile-completeness thresholds, legal-identity dedup, the 12-18 month account lifecycle.
LinkedIn Bot Detection — Behavioral Classifier and Restriction Ladder
Mouse entropy, inter-action timing, session fingerprinting, the 5-stage restriction escalation.
Residential Proxies and IP Infrastructure — The Datacenter-IP Cliff
Datacenter vs residential vs mobile, TLS fingerprinting (JA3/JA4), sticky session TTLs, IP-fingerprint binding.
Connection Limits and SSI — The Rate-Limit Topology
100/week cap, withdrawal-acceptance ratio, SSI four-dimension scoring, the soft-block escalation ladder.
LinkedIn Account Warmup — Manual Engagement and the Behavioral Baseline
The 2-4 week ramp, profile-depth construction, why automated warmup is now detected.
LinkedIn Messaging — The Four Surfaces
Connect note, post-connect, InMail, voice — 300-char limit, credit economics, multi-touch cadence.
The Automation Landscape — Six Categories, Six Detection-Risk Profiles
Browser-ext vs cloud vs mobile vs API vs headless vs human-in-loop. Empirical detection rates per category.
Compliance — hiQ, ToS, GDPR, and the Post-Van Buren Landscape
hiQ v. LinkedIn, Van Buren v. US, GDPR Article 6(1)(f), the operator's risk surface.
When Conferences Beat Cold Outbound — The ROI Breakeven
Per-attendee cost ($4.5-12K major event), cold-outbound equivalents, ICPs where the channel dominates.
ICP Velocity Testing — Compressing 8 Weeks Into 3 Days
Pre-PMF compression, the 5-min disqualify, parallel ICP hypothesis testing across 35-60 conversations.
Pre-Event Outreach — Meeting-Density Math and the 4-6 Week Runway
Meeting-density ceilings (15-25/day), attendee-list reconstruction, 1.4x over-booking, sequencing cadence.
VIP Dinners and Hosted Events — The Highest-Leverage Format
Invite math (30→12→8), per-head budget by city, co-host strategy, 5-10x conversion vs booth.
Conversation Engineering — The 5-Minute Qualifying Frame
The graceful disengage, deep-conversation extension, warm-intro request, networking anti-pattern.
Note-Taking Systems — Memory Fails at Scale
The 30-min capture window, structured field schema, end-of-day sync, the 24h/48h/7d follow-up queue.
Follow-Up Cadences — The 24h Window and the Cliff
24h window (25-40% conv), 7d asset, 30d check-in, 90d re-engagement, per-tier cadence.
Lead Magnets and Post-Event Assets — The Bespoke Handoff
Bespoke vs templated (25-40% vs 0-3%), per-asset production cost, the 40-asset/5-day ceiling.
Why You Buy Separate Sending Domains — Reputation Contagion
The corporate-mailbox failure mode, per-domain inbox math, the $12 replace vs months remediation asymmetry.
Domain Selection — TLDs, Naming, and the Bulk-Convention Risk
TLD reputation differential, brand-adjacent naming patterns, trademark/typosquatting boundaries.
Registrar Selection — What Matters, What Doesn't
Privacy posture, DNSSEC, bulk-registration tooling, transfer-out friction. The renewal-pricing trap.
The Domain Buying Workflow — 30 Domains in One Session
Anti-bulk-registration heuristics, registrant-entity decision, privacy config, DNSSEC at registration.
DNS Hosting — The 30-Zone Management Problem
Registrar-bundled vs major cloud vs dedicated. DNSSEC chain-of-trust, propagation, TTL discipline.
Mailbox Providers — Google Workspace vs Microsoft 365 vs Others
Per-tier cost, sending caps (2K vs 10K/day), the home-court placement pattern, alternative providers.
Multi-Mailbox Setup — Bridge to Authentication
2-3 mailboxes per domain, naming consistency, MX records, the handoff to SPF/DKIM/DMARC.
The Principles of Cold Copy — Good vs Bad, Annotated
Specificity, brevity, recipient-orientation, explicit ask. AI-slop failure modes. Annotated examples.
Subject Lines — The First 35 Characters and the Open-Rate Cap
35-char mobile preview, pattern empirical conversion (question/specific/short/internal), A/B methodology.
Opening Lines — The First 15 Seconds
8-15 second decision window, specific observation, mutual-connection, AI-opener detection patterns.
Value Proposition Framing — Outcome, Problem-Solved, Peer-Validated
Three frames that work, four that fail. Vocabulary-matching test. The credibility anchor.
CTA Architecture — Heavy vs Light Asks
Per-touch CTA progression, single-question 4-7% reply, the calendar-link-first-touch failure, the explicit out.
Personalization at Scale — The Superficial-Personalization Cliff
Four tiers (templated → bespoke), per-tier reply rates, the cliff where light personalization underperforms.
Email Multi-Touch Sequencing — The 5-7 Touch Cadence
Per-touch reply curve, cumulative compounding, 7-day vs 14-day cadence, the implicit-rejection threshold.
Phone Outbound — The Dying-But-Not-Dead Channel
Per-segment connect rates (3-15%), caller-ID spam-filtering, voicemail decision, TCPA boundaries.
Multi-Channel Orchestration — Email + LinkedIn + Phone
Single (2-4%) → 2-channel (4-7%) → 3-channel (6-9%). The channel-noise cliff at 4+.
Closed-Won Deconstruction — The First-Party Signal
5-7 customer minimum, attribute extraction, differential vs closed-lost, the expansion-customer signal.
First-Party Signal Mining — Your Data First
Web analytics, product usage, support tickets, demo requests. The signal-decay 90-day refresh.
ICP Hypothesis Testing — Falsifying the Definition
Treating ICP as falsifiable, 80-150 touches per hypothesis, the parallel-test pattern, productionization decision.
Prospect-Graph Construction — Beyond the Flat List
Account+stakeholder+relationship+signal graph. Per-account multi-stakeholder targeting 2-4x lift.
Segmentation Architecture — Cohort Design
Per-segment 3-7x reply differential, stage-of-awareness, relationship-temperature, over-segmentation problem.
Intent Data Integration — Where the Signal Is
Search/content/technographic/hiring/funding/exec-move signals. The 'intent as ICP' failure mode.
Enrichment Vendor Tradeoffs — Data Quality at Scale
Per-attribute accuracy ranges, multi-source enrichment, GDPR posture, scraping legal exposure post-hiQ.
Operational List Management — Hygiene at Production Scale
30-50% staleness in 6mo. Suppression, deduplication, refresh cadence, list-rotation, CRM handoff.
Reply Classification — The Five Categories
Positive/negative/objection-with-signal/soft-pass/auto-responder. Per-category routing rules.
Reply Routing Architecture — Messaging vs CRM
Slack-class routing in <4h, CRM async handoff, per-tier prioritization, OOO-aware re-send.
Triage Workflow — The Four-Hour Window
15%+ vs 5% conv differential, per-category SLA, on-call rotation, AI-augmented triage.
Objection Handling — Four Canonical Objections
Timing/budget/authority/fit. Per-objection conversion rates, the acknowledge-reframe-asymmetric-offer arc.
Meeting-Booking Mechanics — Reply to Calendar to Show
Calendar link vs manual coordination, show-rate empirical pattern, no-show recovery, multi-stakeholder booking.
Nurture Cadences — Not-Yet-Ready Contacts and 30/60/90
Per-category nurture, trigger-based re-engagement 3-7x lift, content-asset distribution, fatigue threshold.
Pipeline Conversion Math — The Per-Stage Funnel
Send→open→reply→meeting→opp→closed-won. Per-segment unit economics. AE-load math.
When the Design Partner Motion Fits — Strategic Case
When it works (pre-PMF B2B SaaS), when it doesn't (post-PMF, PLG), the 4 alternative motions.
Recruiting Design Partners — The 30-to-3 Pipeline Math
30→8→3 funnel, ICP-fit prioritization, YC-batch leverage, conversion of cold-replies to DP conversations.
Structuring the Design Partner Agreement — Scope, Term, Exchange
Exchange architecture, 3-9 mo term, scope boundaries, the legal-document template.
Running the Design Partner Program — The 10-15 Hour Rule
Weekly cadence, structured feedback capture, per-partner success criteria, the founder time-allocation rule.
Converting Design Partners to Paid — The End-of-Term Moment
30-60% conversion empirical, the 4-stage conversation, pricing-discount pattern, multi-year commitment.
The Reference-Customer Handoff — From Partner to Logo
Per-asset production sequence, case-study workflow, the 1.4-2.1x downstream reply lift on published case studies.
Discovery Call Architecture — The 30-Minute Frame
Opening/context/discovery/proof/next-step. 60-80% advancement rate when run right. The 70/30 listen-talk rule.
Qualification Frameworks — BANT, MEDDIC, SPICED Done Right
Per-framework fit by ACV. Frameworks as conversational architecture, not checklist. Multi-framework hybrid.
Demo Engineering — What You Show, When
Structured second-call demo (20-25 min), customer-in-driver-seat, recorded-demo handoff, multi-stakeholder choreography.
Multi-Thread Engagement — Beyond the Champion
Single-thread 8-15% vs three-plus-thread 35-50% close. Per-role engagement, political mapping, joint-meeting risk.
Proposal and Contract Design — From Verbal to Signed
Proposal-as-summary vs proposal-as-pitch. Procurement navigation, legal redlines, expiration discipline.
Founder-Led Sales — Through the First $1M ARR
20-35% close rate vs early-AE 5-15%. Time allocation, single-pipeline rule, burnout signal, founder-only-AE ceiling.
The First AE Transition — When, Who, How
Empirical $500K-1.5M ARR timing, AE profile by segment, structured 90-day ramp, premature-hire failure mode.
We operate the whole stack as a service.
All the infrastructure in these guides — domains, DNS, warmup, LinkedIn accounts, sequencing, reply routing — run end-to-end by an engineer in your Slack. The stack lives under your entity.