Sender Score: What It Is and How to Improve Yours

Sender Score

A sender score is a numeric rating of your sending reputation, from 0 to 100, that mailbox providers use as one signal in deciding whether your mail reaches the inbox.

What it measures

Sender Score, run by Validity, rates an IP from 0 to 100 based on complaint rates, spam-trap hits, blacklist appearances, and message volume. Higher is better, and above 90 is healthy. It's one reputation signal among several, not the whole story, but a low score reliably correlates with delivery problems.

How to improve it

The levers are the usual ones: authenticate with authentication, cut your bounce rate, keep complaints down, and remove disengaged recipients. A low score is a symptom. The fixes are upstream in list hygiene and sending practice.

How Nitrosend tracks reputation

Nitrosend grades your spam rate against Gmail's 0.30% block threshold, tracks per-provider placement trends, and gives every domain a health object with a headline state. It's a live view of the reputation a sender score summarises, tied to the specific domain you send on.

FAQ

What is a sender score?

A 0-to-100 rating of your sending reputation based on complaints, spam-trap hits, blacklist status, and volume, used by providers as one delivery signal.

What is a good sender score?

Above 90 is healthy. Below that correlates with delivery problems, usually driven by complaints, bounces, or blacklisting.

How do I improve my sender score?

Authenticate your domain, cut bounces, keep complaint rates low, and remove disengaged recipients. The score follows list hygiene and sending practice.