Sender reputation
Sender reputation is a mailbox provider’s judgement of whether your email is wanted, built from how recipients have treated mail from your domain, IP addresses and mailbox.
How it affects cold email
Reputation decides whether a correctly authenticated email reaches the inbox or spam. It goes up when people read, reply and rescue your mail from spam, and down with bounces, spam traps, complaints and sudden jumps in volume.
Providers don’t publish their scoring. They do publish requirements and limits, such as Google’s guidance to keep the spam rate below 0.1% and never reach 0.3% (Google).
How Inboxed handles it
- Inboxed protects reputation with free warmup, daily limits and random gaps between sends, verification before sending, a suppression list every campaign checks, and automatic pauses: a mailbox pauses above 5% hard bounces (after at least 20 sends), a campaign above 8% (after at least 50), and every mailbox on a domain pauses if the domain is blocklisted.
Related terms
Sources
Sources checked on 8 November 2026. Rules change, so check the source before you rely on a detail.
- Email sender guidelines · Google, Gmail Help
- Sender Best Communications Practices, Version 3.0 · M3AAWG
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