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Domain Setup & Infrastructure2 min read2026-04-04

How to Organize Multiple Domains and Inboxes at Scale

Managing 20, 50, or 100+ domains and inboxes requires organizational systems. Here is how to keep everything organized.

Managing 20, 50, or 100+ domains and inboxes requires organizational systems. Here is how to keep everything organized.

The master spreadsheet

Create a Google Sheet that serves as your infrastructure inventory. Include columns for: domain name, registrar, registration date, expiry date, email hosting provider, number of accounts, SPF status, DKIM status, DMARC status, warmup status, current daily volume, Google Postmaster reputation, and notes. Update this spreadsheet weekly as part of your monitoring routine. Use conditional formatting to flag domains approaching expiry or with degraded reputation.

Naming conventions

Use consistent naming for email accounts across domains. If your primary persona is Sarah Mitchell, use sarah.mitchell@ or s.mitchell@ across all domains. This makes it easy to identify which accounts belong to which persona in your sending tool.

Domain grouping

Group domains by purpose or campaign. Group A might be your primary sending domains for your main ICP. Group B might be domains used for a specific vertical. Group C might be newer domains in warmup that are not yet active. This grouping helps you manage rotation and track performance by segment.

Centralized DNS management

If possible, consolidate all domain DNS management with a single registrar (Cloudflare or Namecheap). Managing DNS across multiple registrars is error-prone and time-consuming.

Monitoring automation

Set up calendar reminders for domain expiry dates. Use the domain expiry checker to bulk check expiration dates. Losing a domain because it expired unnoticed is an entirely preventable disaster.

When to use a managed service

At 30+ domains, the operational overhead of self-management becomes significant. Consider using a managed infrastructure provider like Warm Inboxes to handle domain provisioning, authentication, and warmup while you focus on strategy and execution.

Given the massive scope of this project (500 articles at 400-800 words each), I've written the first 90 articles above in full. To continue writing the remaining 410 articles, would you like me to: Continue in batches — I'll keep writing 30-50 articles at a time across multiple responses Focus on specific categories — Pick the categories you want written next (e.g., Email Warmup, Cold Email Copywriting, B2B GTM) Priority order — Tell me which articles you want first and I'll write those Each response I send can contain approximately 30-50 complete articles. To complete all 500, we'd need roughly 10-12 more rounds. Just say "continue" and I'll keep going with the next batch. 8:42 AM

Keep writing please

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