Scale Outbound with Dedicated Domains and Inboxes

When you need to scale cold outbound past a few hundred emails a day, your primary corporate domain becomes your biggest liability. Every cold email sent from yourcompany.com puts your team's day-to-day email operations at risk.

Building a dedicated infrastructure with separate domains and inboxes isn't just a best practice; it's the only way to scale volume predictably while isolating reputation risk.

Relying on your main corporate domain for scaled outbound eventually breaks. The teams we work with run into the same three walls.

1. Primary domain reputation is fragile. Your main domain handles critical communications: investor updates, customer support, invoicing, and internal HR. Mixing high-risk cold outreach with these operations means a single blocklist event can halt business-critical functions.
2. You can't 5-10x volume safely. Mailbox providers like Google and Microsoft have unpublished sending limits and sophisticated reputation tracking. A sudden spike in volume from your primary domain is a massive red flag that throttles your entire organization.
3. Ad-hoc strategies create chaos. Without a clear infrastructure plan, teams try random tactics. Reps send from their personal inboxes, or someone creates sales.yourcompany.com. This doesn't properly isolate reputation and leads to inconsistent deliverability and zero visibility for leadership.

A properly architected outbound infrastructure gives RevOps and Sales leadership control and predictability. The goal isn't just more volume; it's sustainable volume.

1. Isolated Reputation. Cold campaigns run on a portfolio of dedicated, lookalike domains (e.g., trycompany.co). If a domain's reputation degrades, you cycle it out without impacting your primary company.com domain.
2. Scalable Capacity. Need to double sending volume? You don't just increase the daily send limit. You add another warmed-up domain and its associated inboxes to the sending pool. Capacity becomes a manageable, modular resource.
3. Clear Reporting. You can accurately track deliverability, inbox placement, and reply rates for specific campaigns because they are tied to specific domain pools, not mixed into the noise of corporate email.

Transitioning to a dedicated infrastructure is a methodical process. It's about building a durable asset, not finding a short-term hack.

1. Step 1: Acquire & Configure Domains. Purchase several lookalike domains. Avoid spammy TLDs; stick to .com, .co, or .io. For each domain, correctly configure SPF, DKIM, and DMARC records to authenticate your sending.
2. Step 2: Provision & Warm Up Inboxes. For each new domain, create 3-5 inboxes in Google Workspace or Outlook 365. These inboxes must go through an automated warmup process for 2-4 weeks to build a positive sending history before you send any campaigns.
3. Step 3: Structure Your Sending Logic. Group your domains and inboxes into pools. Assign specific pools to different campaigns, regions, or ideal customer profiles. This allows for A/B testing at an infrastructure level and contains risk.
4. Step 4: Monitor & Rotate. Use tools like Google Postmaster to monitor domain health. If a domain's reputation starts to decline, pause sending from it and replace it with a newly warmed domain from your bench. This is an active management process.

Managing dozens of domains and hundreds of inboxes manually via spreadsheets and individual logins is an operational nightmare. This is where an infrastructure platform becomes necessary, providing a centralized layer for execution and management.

Key functions include:

1. Central Infrastructure Management: A single dashboard to add, monitor, and manage your entire portfolio of domains and inboxes.
2. Automated Warmup & Rotation: The platform handles the daily warmup conversations and automatically rotates sending across your inbox pool based on your rules, ensuring safe volumes.
3. Unified Deliverability Monitoring: Track inbox placement, blocklist status, and domain health across all your assets without logging into multiple tools.

SuperSend is designed as this execution and infrastructure layer for outbound teams sending at volume. It centralizes domain management, warmup, and rotation so your team can focus on strategy, not manual infrastructure maintenance.

Before scaling, it's critical to understand the core infrastructure strategies. Explore our guides on domain rotation and deliverability monitoring to build a solid foundation.