Carriers treat you the way your recipients treat you. Every complaint, every STOP, every spam report feeds a score that decides whether your next message lands or gets filtered. It builds slowly on good behavior and collapses fast on bad, and you can't buy your way back once it's damaged.
What builds it, what breaks it
Builds it: consented sends, honored opt-outs, low complaints, consistent sending patterns. Breaks it: blasting unconsented lists, ignoring STOPs, spammy content, sudden volume spikes from a cold number. The score is behavioral, so the fix is behavioral.
Why it's a cycle-long asset
A campaign that protects reputation from message one has headroom when GOTV volume spikes. One that abuses a number all summer finds it throttled in the final week. Reputation is infrastructure you build early, not a setting you flip late.
Frequently asked questions
What is sender reputation in texting?
The carriers' running assessment of whether your messages are wanted, based on complaint rates, STOPs, and spam reports. Good reputation delivers; bad reputation gets filtered.
Can you fix a bad sender reputation quickly?
No. It's earned over time through clean sending, honored opt-outs, and low complaints. Damage happens fast; recovery is slow, which is why you protect it from the start.
Informational, not legal advice.
Keep reading: Why political texts get filtered and How many texts can I send per day.