DFY GTM Systems

Domain Reputation Guide

By Abdul Sami, GTM Engineer · 6 min read · Last updated

Domain reputation is the score mailbox providers keep on your sending domain, built from complaint rates, bounce rates, engagement, and sending history. It decides inbox vs spam more than any other factor. It builds slowly (weeks), burns fast (days), and repairs slower than it burns.

What moves the score

  • Spam complaints heaviest negative. Keep under 0.1%.
  • Hard bounces keep under 2% with verified lists.
  • Engagement opens, replies, 'not spam' rescues build credit.
  • History aged, consistent senders get trust; new domains get scrutiny.
  • Volume consistency spikes read as compromise or spam.

Why cold email risks the primary domain

Cold outreach inherently gets more complaints than opt-in mail. That's the entire argument for separate sending domains: reputation risk is quarantined to expendable assets, never your brand domain.

Monitoring

Google Postmaster Tools (free) shows domain reputation for Gmail. Inbox placement tests and seed lists cover Microsoft and others. Watch weekly during active sending; reputation problems compound silently.

Repairing a burned domain

  • Stop all sending from it.
  • Fix the root cause (list source, complaints, auth break).
  • Rest 2–4 weeks minimum.
  • Re-warm slowly with engaged recipients.
  • Often cheaper: retire it and start a clean domain properly.

FAQ

How do I check my domain reputation?
Google Postmaster Tools for Gmail reputation; placement testing tools for the rest. Sudden open-rate collapses across providers are the operational symptom.
How long does reputation repair take?
Weeks to months of clean sending after the cause is fixed. Prevention verified lists, complaint control, separate sending domains is dramatically cheaper.
Does domain age matter?
Yes. Domains under 30 days old face extra filtering scrutiny. Buy sending domains early and age them with warm-up before campaigns.
AS

Abdul Sami

GTM Engineer, DFY GTM Systems

7+ years building outbound systems for B2B companies across the US, UK, Australia, and DACH. Specializes in Clay workflows, cold email infrastructure, intent-based lead sourcing, and deliverability.

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