What is a good Sender Score?

Higher is better on the 0 to 100 scale, with strong senders typically near the top. Treat it as a directional reputation gauge rather than a precise threshold.

Who runs Sender Score?

Validity operates Sender Score and offers free lookups at senderscore.org, modelling reputation from signals like complaints, spam traps, and volume consistency.

Does a high Sender Score guarantee inbox placement?

No. It correlates with good placement but is one estimate; authentication, content, and per-provider rules also decide where mail lands.

Growth Marketing Glossary

Sender Score

Sender Scoreproper noun

A credit score for your mail server — a quick read on how the inbox sees you.

Schematic — Sender Score 0 to 100

Owner: Validity
Scale: 0 to 100
Higher is: better reputation
Free check: senderscore.org

Forms & parts of speech

Sender Score · noun

Validity's 0 to 100 reputation rating for a sending IP.

"Our Sender Score fell to 70 after a bad send — placement followed it down."

What the number represents

Sender Score, run by Validity, rates a sending IP address from 0 to 100 based on how mailbox providers and spam filters appear to treat mail from that IP and similar senders.

It works like a credit score. A high score signals a trustworthy sender and tends to come with good inbox placement; a low score signals risk and correlates with filtering and blocks.

How to read it

The score is an estimate built on signals like complaint rates, spam-trap hits, unknown-user rates, and volume consistency. It is a useful directional gauge, not the literal rule any single provider uses.

Treat it as one instrument among several. A falling Sender Score is an early warning to investigate list hygiene and sending practices before placement drops; a high score is reassurance, not a guarantee.

Worked example. Suppose a sender's IP usually sits around 95 on Sender Score and drops to 70 after a large send to a stale list that triggered complaints and spam traps. Inbox placement falls in step. The score did not cause the problem — it surfaced it early, pointing straight at list hygiene.

Cleaning the list and warming the IP back up lifts both the score and placement over the following weeks.

Failure modes to watch. Treating Sender Score as the exact rule any mailbox provider applies; chasing the number instead of the practices behind it; and assuming a high score guarantees inbox placement when content and authentication still matter.

Benchmarks

Sender Score is a modelled estimate from Validity, not the rule any single provider uses. Track its trend and pair it with placement and authentication checks.

Scale

0 to 100

Strong senders

near the top

Read as

directional, not absolute

Ranges are illustrative; every published figure is cited from a named public source or labelled “RGM analysis.”

Synonyms & antonyms

Synonyms

sender reputation score

Antonyms

blocklist

Usage trends

Search interest for this term over the last five years:

View interest-over-time on Google Trends →

Common questions

What is a good Sender Score?: Higher is better on the 0 to 100 scale, with strong senders typically near the top. Treat it as a directional reputation gauge rather than a precise threshold.
Who runs Sender Score?: Validity operates Sender Score and offers free lookups at senderscore.org, modelling reputation from signals like complaints, spam traps, and volume consistency.
Does a high Sender Score guarantee inbox placement?: No. It correlates with good placement but is one estimate; authentication, content, and per-provider rules also decide where mail lands.

Related tools & calculators

Resources & people to follow

referenceValidity — Sender Score (senderscore.org)
referenceValidity — sender reputation research

Curated, non-competitor resources verified per term.

Sources

trendsGoogle Trends — "sender score"