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How to Build a Scalable, Cost-Effective Cold Email Infrastructure for Better Deliverability

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Introduction to Cold Email Challenges

Many businesses waste money on Google Workspace inboxes paying around $7 each while struggling to get their cold emails delivered effectively. The core issue is poor deliverability, emails often go straight to spam or get blocked, reducing outreach efficiency drastically.

Common Myths About Email Deliverability

  • Deliverability isn't just about avoiding spammy words or tweaking subject lines.
  • Crucial factors include inbox warming, domain age, IP reputation, and correct DNS record configuration (SPF, DKIM, DMARC).
  • Proper infrastructure outweighs email copy quality in landing rates.

Why Google Workspace and Outlook Limits Scaling

  • Google Workspace costs approximately £5.90 ($7)/user, limiting ability to scale beyond a few hundred emails daily.
  • Outlook pricing is even higher (£8.49/user).
  • These platforms don't support affordable expansion to large volumes needed for effective cold outreach.

Ben's Own Infrastructure Approach

Ben uses his own dedicated email infrastructure with warmed inboxes and dedicated IPs, dramatically reducing spam rates. His testing shows only 2 spam emails out of 853 sent vs. 43 spam emails using shared services.

Recommended Setup Components

  1. SparkPost (SMTP server): Sends emails with control over sending IPs.
  2. MXroute (Email hosting provider): Hosts unlimited inboxes economically for receiving replies.

Setting Up the Infrastructure

  • Purchase multiple domains (~$8/domain).
  • Use MXroute to create unlimited mailboxes across these domains at $49/year.
  • Use automation scripts to configure DNS (SPF, DKIM, DMARC) via Namecheap, simplifying domain verification.
  • Configure SparkPost with a dedicated IP ($75/month) to ensure IP reputation management and avoid suspensions.
  • Import mailboxes into email management platforms like Instantly for unified sending and tracking.

Financial Comparison and Scalability

  • Buying 15 domains and using MXroute plus SparkPost costs about $200 initial and $75 monthly.
  • Equivalent capacity on Google Workspace would cost about $360 upfront plus $210 monthly, limiting scalability.
  • This setup enables sending thousands of emails daily with better deliverability and cost efficiency.

Deliverability and Outreach Best Practices

  • Warm up new inboxes slowly over 3 weeks before scaling.
  • Maintain correct DNS records for authentication.
  • Use dedicated IP addresses to maintain consistent sending reputation.
  • The volume of outreach increases chances of booking calls and closing deals.

Actionable Steps Summary

  1. Purchase multiple domains.
  2. Set up MXroute email hosting for unlimited inboxes.
  3. Automate DNS record setup on Namecheap.
  4. Register domains in SparkPost and acquire a dedicated IP.
  5. Create email accounts, import them into Instantly or similar for sending.
  6. Warm up inboxes properly.
  7. Begin scaling cold email campaigns efficiently.

For additional insights on the technical setup and avoiding costly providers, refer to Choosing the Best Mailbox Solution for Scalable Cold Email Outreach.

Conclusion

Investing in your own cold email infrastructure with SparkPost and MXroute enables affordable, scalable outreach with higher inbox placement rates than popular platforms like Google Workspace. Landing your emails in prospects' inboxes, not just perfect templates, drives client acquisition and revenue growth.


Ben emphasizes that using this infrastructure, combined with proper technical setup and warm-up, can dramatically improve cold email campaign success and outpace competitors relying on expensive, less effective solutions. This no-nonsense, practical approach demystifies cold email scaling for business growth.

For a broader perspective on enhancing your cold email game, consider reading Mastering Cold Email: Ultimate 2025 Guide for Business Success. Additionally, exploring 8 Proven Strategies for Generating Quality Leads in SaaS can complement your outreach efforts with effective lead generation tactics.

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