// Glossary
Sender Reputation
A score mailbox providers assign your sending domain and IP that determines whether mail lands in inbox or spam.
Definition
Sender reputation is the trust mailbox providers place in your sending domain and IP address, built from signals like bounce rates, spam complaints, authentication, engagement, and spam-trap hits. A strong reputation means more of your mail reaches the inbox; a poor one routes you to spam or blocks you. It's earned over time through verified lists, gradual warmup, and sending mail people actually want.