Email leaves a mail server through one or more public IP addresses. Receiving systems may consider the historical behavior associated with those addresses when evaluating incoming messages.
What is IP reputation?
IP reputation represents trust signals associated with previous sending behavior from a particular address.
What can damage IP reputation?
- Large volumes of spam
- Compromised customer accounts
- High delivery-failure rates
- Sending to spam traps
- Increasing complaint rates
Can one account affect other users?
On shared email infrastructure, an abused account that produces significant spam can potentially affect other legitimate senders using the same outbound IP.
Why server management matters
Monitoring unusual sending patterns, stopping compromised accounts quickly and maintaining secure infrastructure are important for preserving IP reputation.
IP and domain reputation work together
Modern filtering systems consider multiple signals, including domain authentication, infrastructure reputation, content and sending patterns.