An Email Blocklist is a database of IP addresses or domains suspected of sending spam emails, used to protect email users.


An Email Blocklist, also known as an Email Blacklist, is a database of IP addresses or domains that are suspected to send spam emails. Internet Service Providers (ISPs), Email Service Providers (ESPs), and third-party services often maintain these lists to protect email users from spam or malicious content. If an IP address or domain is on a blocklist, emails sent from that source are likely to be marked as spam or even rejected entirely.

Usage and Context

Email blocklists are used widely across the internet to maintain email integrity and safety. They play a crucial role in the world of email marketing, where high deliverability rates are essential for success. If a business finds itself on an email blocklist, it can significantly impact their email marketing efforts, causing their emails to be blocked or sent directly to the recipient's spam folder.


What causes an IP or domain to be added to an Email Blocklist?

If an IP or domain sends a large volume of spam or malicious content, it can be added to an Email Blocklist. Other reasons include sending emails to 'spam traps' or email addresses that are no longer in use.

How can you remove your IP or domain from an Email Blocklist?

The process varies depending on the specific blocklist. In general, you'll need to identify why you were added to the blocklist, resolve the issue, and then submit a request for removal.

Related Software

Several software tools can help monitor and manage your email reputation to avoid blocklists. These include Senderscore, MXToolbox, and Barracuda Central.


Using an email blocklist helps protect users from spam or potentially harmful content. For businesses, staying off blocklists can ensure higher deliverability rates for their email marketing campaigns.


In the world of email communication, an Email Blocklist is a powerful tool for maintaining the integrity and safety of inboxes. Understanding the causes and consequences of being listed can help businesses maintain their email reputation and ensure successful email marketing campaigns.

Related Terms

Acceptable Spam Report Rate

Acceptable Spam Report Rate is the permissible percentage of email recipients marking an email as spam, used to gauge email quality and relevance.

Anti-spam Laws

Anti-spam laws are regulations set by governments to prevent or restrict the sending of unsolicited electronic messages. They protect users from spam, scams, and maintain the integrity of communication channels.


CAN-SPAM is a US law regulating commercial emails, providing guidelines for legal emails and granting recipients the right to stop such emails.

ESP (Email Service Provider)

ESP stands for Email Service Provider, a company that offers email services. It is primarily used by businesses for email marketing.

Email Deliverability

Email Deliverability refers to the ability of an email to reach the recipient's inbox without being flagged as spam or getting lost.

Email Marketing

Email marketing is a direct marketing strategy that involves sending emails to prospects and customers to promote products, discounts, and events.

Email Marketing Analyst

An Email Marketing Analyst is a professional who analyzes and improves email marketing campaigns, leading to increased customer engagement and sales.

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Learn about Email Marketing Automation, its usage, benefits, related software and common questions related to it.

Email Marketing Director

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Email Marketing Manager

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Email Marketing Metrics

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Email Marketing Specialist

An Email Marketing Specialist is a professional who handles all aspects of email marketing campaigns, from planning to execution and analysis.

Email Marketing Strategist

An Email Marketing Strategist is a professional who develops and executes email marketing campaigns to promote a product, service, or idea.

Email Service Provider (ESP)

An Email Service Provider (ESP) is a company that offers services for sending out email campaigns. It's a crucial tool for email marketing.

Email Spam

Email spam, also known as junk email, is unsolicited bulk messages sent through email. This term includes the definition, usage, FAQs, related software, benefits, and conclusion.

Mass Email Marketing

Mass Email Marketing is a digital marketing strategy that involves sending promotional emails to a large group of people or potential customers at once.

Permission Email Marketing

Permission email marketing is a form of digital marketing that involves sending promotional emails to individuals who have given their consent.

Spam Filter

A spam filter is a program that detects unwanted email, preventing these messages from reaching a user's inbox. It improves email experience and security.

Viral Email Marketing

Viral Email Marketing is a strategy that uses compelling email content to encourage recipients to share the message, increasing brand reach and conversions.
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