Sender Reputation
Sender Reputation is the overall trust score that email providers and mailbox systems assign to an email-sender — combining domain reputation, IP reputation, sending behavior history, complaint rates, and engagement metrics.
What is Sender Reputation?
Sender Reputation is the most important factor in email deliverability — more than content, more than authentication. Reputation goes down with spam complaints, bounces, low-engagement sends, and sending spikes. Reputation goes up with consistent volume, strong engagement, and complaint-free sends. The damage from a reputation hit is asymmetric: bad reputation takes weeks to recover from; good reputation takes months to build. Mature programs treat reputation as the #1 deliverability lever and operate accordingly.
Why it matters
- Single biggest factor in email deliverability — outweighs content, beats authentication.
- Reputation damage is slow to recover — preventive discipline matters more than reactive fixes.
- Sending consistency matters more than sending sophistication — steady beats spikes.
Use cases
- Reputation monitoring. Tracking reputation scores at Google Postmaster, Microsoft SNDS, and similar tools.
- Volume ramping. Gradually building send volume to grow reputation safely.
- Multi-mailbox isolation. Separating sending streams so reputation problems don't cross-contaminate.
How turgo helps
turgo monitors sender reputation per mailbox continuously, pauses sending automatically when reputation dips, and isolates sending streams to limit cross-mailbox contamination.
See turgo in action →
