Signal & Syntax · Email deliverability

What Is Sender Reputation?

Sender reputation is the standing mailbox providers give a sending domain and IP. Reputation decides inbox, spam folder or rejection.

Also calledemail reputation · domain reputation · IP reputation

Sender Reputation in Practice

Hard bounces, spam complaints and spam trap hits lower reputation. Authentication with SPF, DKIM and DMARC supports reputation. Gmail shows domain reputation in Postmaster Tools. Sending to addresses no longer accepting mail raises the hard-bounce rate.

Where ScoreMachine Fits

score.email.validation
deliverability.status

deliverability.status returns whether the mailbox accepts mail, before the send.

Related Terms

Hard bounce A hard bounce is a permanent email delivery failure. Spam trap A spam trap is an address blocklists and mailbox providers run to catch poor list hygiene. DMARC DMARC is a DNS policy for mail failing SPF and DKIM alignment. SPF SPF (Sender Policy Framework) is a DNS TXT record listing a domain's permitted sending servers.

Read the Guide

Guide

MX Records, SMTP Codes and Bounces Explained

How an email finds a mailbox, and how the server answers. Read the guide →

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