Field notes

Email Infrastructure

Building Reliable Email Infrastructure for Small Teams

A practical checklist for SPF, DKIM, and DMARC checks when setting up Google Workspace.

When a small team moves its communications to Google Workspace, the biggest surprise is usually deliverability.

Core checks to run first

  1. Verify domain ownership and brand records.
  2. Create SPF record with only one hard include.
  3. Add DKIM keys and publish the selector.
  4. Enable DMARC with a reporting-only policy before enforcing.

You can use simple scripts to verify all of these in one run.

dig +short TXT yourdomain.com | sed 's/^/SPF: /'

Why this matters

Most failed deliveries are caused by a weak DNS chain, not the sending app.
A clean mail infrastructure creates trust with receiving servers and lowers the chance of fallback spam behavior.