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Deliverability Letter

List Broker

Also known as: List Dealers, Spammers

Companies or people who sell or rent email lists to marketers. Buying from them is risky because contacts never asked to hear from you and you can hurt deliverability or break the law.

A list broker is a person or company that collects email addresses and sells or rents them to others. They make money by promising big lists of people who look like good leads. In most cases, the people on those lists never asked to hear from you. That gap is what makes list brokers so risky for real email marketing.

Using a list from a broker can damage your sender reputation fast. People who never heard of you are more likely to ignore, delete, or mark your email as spam. Email providers track this behavior and start pushing more of your mail into spam folders. In some regions, sending to these lists can also break privacy laws that require clear consent.

If you want to grow a healthy list, focus on people who sign up with you directly. Offer useful content, clear value, or simple incentives so they choose to subscribe. This might feel slower than buying a list, but it gives you higher engagement, better deliverability, and fewer headaches later.