cold-iq/coldiq-marketplace-skills/email-infra

Claude Code and agent skill by cold-iq/coldiq-marketplace-skills

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Set up and run cold email sending infrastructure (domains, DNS, mailboxes, warmup) through the ColdIQ marketplace Instantly endpoints. Use when sizing how many domains/mailboxes are needed, provisioning sending accounts, ordering done-for-you pre-warmed inboxes, enabling/monitoring warmup, checking domain availability, or troubleshooting deliverability before going live. Triggers on "email infra", "setup domains", "buy domains", "how many mailboxes", "mailbox setup", "warmup", "warm up", "DNS / SPF / DKIM / DMARC", "Instantly setup", "going live", "deliverability", "DFY inboxes", "pre-warmed domains". Do NOT use for writing campaign sequences or copy (see instantly-api / cold-email-copy) — this skill is about the sending infrastructure, not the campaigns that run on it.

Install

npx vskill@latest install cold-iq/coldiq-marketplace-skills/email-infra

SKILL.md

Email Infrastructure

Take cold email infrastructure from zero to live: size it, provision mailboxes, warm them up, and verify health — using ColdIQ's resold Instantly account/warmup endpoints (BYOK, free, no ColdIQ credits). Once infra is healthy, hand off to instantly-api for campaigns.

ColdIQ Marketplace Endpoints

TaskMethodPathCreditsEndpoint IDNotes
Order DFY pre-warmed inboxesPOST/v1/instantly/dfy-email-account-ordersfreeinstantly.dfy_orders.createFastest path to live
Check domain availabilityPOST/v1/instantly/dfy-email-account-orders/domains/checkfreeinstantly.dfy_orders.domains_checkBefore buying
List pre-warmed domainsPOST/v1/instantly/dfy-email-account-orders/domains/pre-warmed-up-listfreeinstantly.dfy_orders.domains_prewarmedSkip the 2-3 week warmup
Connect a mailboxPOST/v1/instantly/accountsfreeinstantly.accounts.createBring your own mailbox
List mailboxesGET/v1/instantly/accountsfreeinstantly.accounts.listInventory
Get mailbox healthGET/v1/instantly/accounts/{email}freeinstantly.accounts.getPer-account status
Enable warmupPOST/v1/instantly/accounts/warmup/enablefreeinstantly.accounts.warmup_enableStart 2-3 wks before sending
Disable warmupPOST/v1/instantly/accounts/warmup/disablefreeinstantly.accounts.warmup_disableAvoid once campaigns live
Warmup analyticsPOST/v1/instantly/accounts/warmup-analyticsfreeinstantly.accounts.warmup_analyticsHealth scores
Test account vitalsPOST/v1/instantly/accounts/test/vitalsfreeinstantly.accounts.test_vitalsPre-launch check
Daily account analyticsGET/v1/instantly/accounts/analytics/dailyfreeinstantly.accounts.analytics_dailyMonitor live sending

Critical rules (never break)

  1. Never use your primary domain for cold outreach.
  2. Max 2 mailboxes per domain.
  3. One domain = one workspace (never mix).
  4. Use multiple registrars (no single point of failure).
  5. Warm up 2–3 weeks minimum before sending.
  6. Never disable warmup once campaigns are running.
  7. Start conservative, scale gradually.

Infrastructure sizing formula

  • Monthly goal ÷ 20 working days = daily volume
  • Daily volume ÷ 20–25 per mailbox = mailboxes needed
  • Mailboxes × 1.5 (buffer) ÷ 2 = domains needed
  • Provider split: 60% Google Workspace, 40% Microsoft 365

Example: 3,000/month → 150/day → 10–12 mailboxes → 5–6 domains.

DNS — all 4 records required

RecordPurpose
MXRoutes incoming email
SPFDeclares sending servers
DKIMDigital signature authentication
DMARCPolicy for SPF/DKIM failures

(DNS is configured at the registrar/provider — ColdIQ doesn't set DNS. Use the DFY order to skip manual setup.)

Setup flow

  1. Size the infra (formula above).
  2. Fastest path — order done-for-you pre-warmed inboxes (skip manual domain/DNS/warmup).

→ POST /v1/instantly/dfy-email-account-orders · free · instantly.dfy_orders.create

  • First check what's available:

→ POST /v1/instantly/dfy-email-account-orders/domains/pre-warmed-up-list · free · instantly.dfy_orders.domains_prewarmed → POST /v1/instantly/dfy-email-account-orders/domains/check · free · instantly.dfy_orders.domains_check

  1. BYO path — connect your own mailboxes, then enable warmup 2–3 weeks before sending.

→ POST /v1/instantly/accounts · free · instantly.accounts.create → POST /v1/instantly/accounts/warmup/enable · free · instantly.accounts.warmup_enable

  1. Before launch, confirm health.

→ POST /v1/instantly/accounts/warmup-analytics · free · instantly.accounts.warmup_analytics → POST /v1/instantly/accounts/test/vitals · free · instantly.accounts.test_vitals

  1. Go live (ramp), then monitor daily.

→ GET /v1/instantly/accounts/analytics/daily · free · instantly.accounts.analytics_daily

Warmup & ramp

Warmup: Week 1 foundation (no campaigns) · Week 2 building (no campaigns) · Week 3 ready (health 70%+, ideally 90%+). Going-live ramp/mailbox: Wk1 G 10–15 / MS 5–10 → Wk2–3 G 15–20 / MS 10–12 → Wk4+ G 20–25 / MS 12–15.

Healthy metrics

Open 50%+ · reply 2%+ · bounce <3% (target <2%) · spam <0.1% · deliverability >95%. If bounce climbs or vitals drop, pause that mailbox and re-check warmup analytics before resuming.

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

Quality evaluation

  • Task evaluationNot runNo evaluation yet. Run one in Skill Studio.

See evaluation results

Source

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