What is a good Sender Score?

You checked your Sender Score and got a number. Now what does it actually mean?

Sender Score runs on a 0-100 scale and reflects the reputation of your sending IP address. The higher the number, the cleaner your reputation looks to mailbox providers that check this signal when deciding where your email lands.

Here's how the thresholds break down in practice:

• 90-100: Excellent. You're sending cleanly, keeping bounces and complaints low, and most mailbox providers will treat your mail well.
• 80-89: Good. Inbox placement is generally solid, but stricter receivers might add a little extra scrutiny. Worth monitoring.
• 70-79: Fair. Filtering is starting to happen more often. Don't wait to investigate. Things can slide quickly from here.
• Below 70: Problematic. Many filters actively distrust IPs in this range. Deliverability is taking a real hit and you need to act now.

A score above 90 is where you want to be. That said, Sender Score is one signal, not the whole picture. Mailbox providers like Gmail and Outlook build their own reputation models from engagement, complaint rates, and authentication. A strong Sender Score won't save you if you're sending to a stale list or ignoring unsubscribes. (And a slightly lower score doesn't always mean disaster if your other signals are healthy.)

If your score is in the 70s or below, the usual culprits are high bounce rates, spam complaints, or sending to addresses that haven't engaged in a long time. Cleaning your list is often the fastest way to start recovering.

Not sure where to start? You can check if your domain or IP is flagged anywhere with our free blocklist checker, or reach out through the SOS hotline if you're seeing real delivery problems and want a second set of eyes.