Complete cold email infrastructure setup from scratch. Everything you need
delivguru · 2026-02-05 · 2,500 views
Setting up cold email infrastructure from zero is overwhelming. After building infrastructure for 100+ clients, here is my complete setup guide.
What you need:
- Domains: Buy 3-5 domains similar to your main domain. Namecheap or Cloudflare. Budget $10-12 per domain per year.
- Inboxes: 3 inboxes per domain. Google Workspace is the gold standard. You can set up manually or use a managed provider like PuzzleInbox for pre-configured, pre-warmed accounts.
- DNS configuration: SPF, DKIM, DMARC, and MX records on every domain. Non-negotiable.
- Sending platform: Instantly, Smartlead, or Saleshandy to manage sequences and send emails.
- Warmup tool: Built into most sending platforms now, or use a dedicated tool like MailReach.
- Data provider: Apollo for most use cases. Clay for advanced enrichment.
Setup order:
- Buy domains (Day 1)
- Set up Google Workspace accounts (Day 1-2)
- Configure all DNS records (Day 2)
- Connect inboxes to sending platform (Day 2)
- Enable warmup (Day 2)
- Wait 14-21 days for warmup (Day 2-23)
- Build prospect lists during warmup period (Day 3-23)
- Write email sequences (Day 10-23)
- Test deliverability with GlockApps (Day 21)
- Launch first campaign at low volume (Day 23)
Total cost for a starter setup (15 inboxes, 5 domains): approximately $100-150/month for inboxes, $30-50 for sending platform, $0-50 for data. Under $200/month to run a professional cold email operation.
Comments (8)
noobsender · 2026-02-06
this is the most comprehensive setup guide I've seen. one question — is it better to buy domains from one registrar or spread across multiple? worried about one registrar flagging all my purchases
coldkingdom · 2026-02-06
namecheap and cloudflare are both fine. ive bought 40+ domains from namecheap with no issues. they dont care what you use them for as long as its legal. spreading across registrars is unnecessary imo
bouncebetty · 2026-02-07
The 14-21 day warmup window is the most important part of this entire guide. Everything else can be fixed later but rushing warmup damages reputation that takes weeks to recover. I have seen clients lose entire domain sets because they started sending on day 5. Please just wait the full 14 days minimum.
scrappyscott · 2026-02-07
$200/month for the full stack is reasonable but I want to flag that domains add up fast. 5 domains at $12/year is only $60/year but when you're rotating through 15-20 domains it becomes $200+/year just in domain costs. budget for that
techsales22 · 2026-02-08
tbh the manual DNS setup is where most people mess up. one wrong character in an SPF record and your entire domain is compromised. if you're not comfortable with DNS, use a managed provider like PuzzleInbox that handles it for you
sdrgirl · 2026-02-09
Building prospect lists during the warmup period is such a smart use of time! Most people just sit and wait for 2 weeks. Use that time to research prospects, write sequences, and test subject lines so you're ready to launch the second warmup is complete.
dataderek · DataCo · 2026-02-10
the GlockApps test on day 21 is non-negotiable. I track inbox placement for every new domain before first cold send. if it is below 85% the domain gets more warmup time. no exceptions. testing before sending saves you from learning about problems after you have already damaged reputation
frustratedfrank · 2026-02-11
wish I had this guide 6 months ago. I skipped like half these steps and burned through 8 domains before figuring out what I was doing wrong. the total cost of cutting corners was way more than just doing it right from the start