It will depend on the company and the real estate agent email lists you’re generating. Some companies offer instant download real estate lists that may be outdated or have false information. Using this information without validating it first can drastically and negatively affect your mail marketing efforts. Lead generation tools like UpLead offer you a 95% data accuracy guarantee and validate the email addresses you’re downloading in real time so you can confidently add them to your marketing list. UpLead also allows you to generate your own mail marketing lists instead of offering everyone the same instant download lists. That way, you can quickly generate lists filled with both new and updated information.