Duplicates can pose several challenges in email marketing:
Increased Costs: Sending emails to duplicate addresses can inflate your marketing costs, especially if you're paying based on the number of emails sent. Skewed Analytics: Duplicates can distort your metrics, making it harder to track the effectiveness of your campaigns and understand user behavior. Poor User Experience: Receiving multiple copies of the same email can annoy recipients, leading to higher unsubscribe rates and decreased engagement. Deliverability Issues: Email service providers (ESPs) may flag your emails as spam if they detect multiple emails going to the same address in a short time frame.