Cold Outreach Infrastructure Setup Guide for B2B Service Businesses, SaaS, and Agencies

Introduction

Setting up a scalable and high-converting cold outbound system is crucial for B2B service businesses, SaaS, and agencies looking to generate consistently qualified appointments. In this guide, we will walk you through the essential steps to build an infrastructure that ensures 99%+ email deliverability, high response rates, and a predictable pipeline of leads.

📫 Email Infrastructure Setup

1. Use Alternative Domains

Do NOT use your main business domain for cold email outreach. Instead, purchase alternative domains (.com, .co, .io) to improve deliverability.

• Example: If your company is sixfigureconsulting.co, create alternative domains like sixfigureconsultingoutreach.co or sixfigureconsultingagency.com
• Recommended platforms for purchasing domains and mailboxes:
  • Mailreef - For advanced control over email servers.
  • Maildoso - A reputable shared email server platform.
  • Google Workspace or Outlook - If you prefer mainstream email providers (limit of 3 mailboxes per domain).

2. Configure DNS Records for Authentication

• Set up DKIM, DMARC, and SPF to ensure your emails are authenticated.
• Use MX Toolbox to verify DNS records.
• Check domain blacklisting status at mxtoolbox.com/blacklists.aspx or multirbl.valli.org.

3. Warm Up Your Mailboxes

Before launching your outbound campaigns, warm up your new mailboxes to establish credibility with email providers.

• Use built-in warmup in Instantly.ai or Smartlead.ai.
• Alternatively, use a standalone warmup tool like warmupinbox.com.
• Warmup Process:
  • Start with 5 emails/day, gradually increasing by 5 until reaching 40.
  • Set reply rate to 40%.
  • After launching campaigns, adjust to 30 outbound emails/day and randomize warmup emails between 10-20/day.
  • Increase warmup reply rate to 70% to maintain deliverability.

📥 Cold Email Campaign Settings