IP reputation is a score/history that security vendors and mail providers maintain for IP addresses, based on past spam, malware, or abuse activity associated with that IP. Shared hosting environments mean your site can inherit a poor reputation from a completely different, unrelated site on the same server.
Why it matters
- Poor IP reputation can cause your outgoing email to be marked as spam, unrelated to anything your own site did
- Some security tools and firewalls block traffic to/from IPs with a bad reputation score
Checking and improving it
- Look up your server’s IP against reputation/blacklist databases
- If on shared hosting and reputation is poor, consider a dedicated IP or a reputable hosting provider that actively manages abuse on their ranges
- For email specifically, proper SPF/DKIM/DMARC configuration helps mail providers trust your domain independent of the sending IP’s history
FAQ
Can I fix a bad IP reputation myself if I’m on shared hosting?
Not directly — the IP is shared with other tenants, so the realistic fix is moving to a dedicated IP or a hosting provider with stricter abuse controls.