What's New

Back to tools

FREE TOOL

Sender reputation checker

Check domain and IP reputation across major blacklists. Analyze email sender reputation and authentication status.

What reputation check analyzes

Blacklist Status

Checks major spam blacklists like Spamhaus, Barracuda

Reputation Score

Calculates overall sender reputation rating

Authentication

Validates SPF, DKIM, and DMARC configuration

Understanding sender reputation

Sender reputation is a score that Internet Service Providers (ISPs) assign to organizations that send email. It's a crucial factor in determining whether your emails reach the inbox or get filtered as spam.

What affects reputation

Blacklist status

Being listed on spam blacklists severely impacts deliverability.

Authentication

Proper SPF, DKIM, and DMARC configuration builds trust.

Engagement rates

Low opens and high complaints hurt reputation scores.

List quality

High bounce rates indicate poor list hygiene.

How to improve

Start gradually

Build reputation with small volumes to engaged recipients.

Clean your list

Remove inactive subscribers and bounced addresses regularly.

Monitor continuously

Check blacklists and reputation scores proactively.

Send quality content

Provide value that recipients actually want to receive.

Frequently Asked Questions

Sender reputation is a score assigned by Internet Service Providers (ISPs) to an organization's sending IP address and domain. It determines whether your emails are delivered to the inbox, sent to the spam folder, or rejected entirely.

Improve reputation by sending relevant content to engaged users, removing inactive subscribers, authenticating your emails (SPF, DKIM, DMARC), and avoiding spam triggers in your content.

Blacklists (or blocklists) are databases of IP addresses and domains known to send spam. ISPs use these lists to filter incoming email. Being listed can severely impact your email deliverability.

It's recommended to monitor your reputation continuously, especially if you send large volumes of email. Regular checks help you catch and resolve issues before they cause significant delivery failures.

Protect your sender reputation

InboxKit monitors reputation 24/7, alerts you to issues, and helps maintain high deliverability