A suppression list in email marketing is a list of email addresses that are excluded from receiving marketing emails. Email addresses may be added to the suppression list for various reasons, including:
- If an email recipient has unsubscribed from the mailing list
- If an email recipient has complained about receiving emails
- If an email address is associated with a bounced email or invalid address
Using a suppression list improves email deliverability, ensures compliance with anti-spam regulations, and ultimately leads to better engagement and response rates by ensuring that you're only sending emails to engaged subscribers.