The Apparent Benefits of Using Public Lists
The biggest benefit is the cost. Public lists are often free. This saves you money right away. You don't have to spend on marketing. You don't have to build a list. This saves a lot of time. It seems like a fast way to start. It gives you a large number of emails. You can begin your campaign instantly. This quick start is very attractive. It is why many people consider it.
Free and Easy Access to Email Addresses
Getting a public list is simple. You can find them with a quick search. You can download them instantly. They often come in a simple file. This gives you a lot of contacts. You can have thousands of emails in minutes. This telemarketing data makes it seem very easy. It removes the hard work of list building. This easy access is a major draw. It appears to be a shortcut to success.
Saving Time and Effort on Marketing
Building a good email list takes work. You have to create valuable content. You have to make sign-up forms. You have to promote your forms. This process is slow. It takes a lot of time and effort. Using a public list avoids this. You can skip all the hard parts. You can go straight to sending emails. This saves you from a lot of hard work. Therefore, it is a very tempting option.

The Big Risks of Using Public Email Lists
The risks of using these lists are huge. The data is almost always bad. The lists are not verified. They contain many invalid emails. They have old or fake addresses. This leads to a high bounce rate. High bounce rates hurt your sender reputation. It tells email providers you are a spammer. Your emails will go to spam folders. This can happen even to your good emails. It is a major risk for your business.
Legal and Ethical Issues with Public Lists
Using public lists is often illegal. It violates privacy laws. Laws like GDPR and CAN-SPAM are very strict. These laws require consent. People must give you permission to email them. You do not have this permission with a public list. This can lead to big legal trouble. You can face huge fines. Your email provider might also shut you down. It is not an ethical way to do business. It can damage your reputation forever.
Low Engagement and a High Spam Rate
The people on these lists don't know you. They have no relationship with you. They did not ask for your email. They are not interested in your messages. This leads to very low engagement. Your open rates will be terrible. Your click-through rates will be even worse. Many people will mark you as spam. This high spam rate is a red flag. It is a clear sign that your list is bad.