Spamtraps, also known as honeypots, are email addresses created by monitoring companies designed to catch spammers. If you send an email to a spamtrap, the sending IP is blacklisted, typically for 24 hours. The more often you hit spamtraps, the more the monitoring companies will lower your sending reputation. Once your reputation is low enough, spam filters will automatically start blocking your emails.
To avoid spamtraps you need to make sure your database is clean and validated. While no service can specifically tell you what emails are spamtraps, you can lower your chances of hitting one by doing the following:
Never send emails to purchased lists. Monitoring companies such as SpamCop will leak spamtraps onto purchased lists. If you send an email to that list, they know you didn't follow proper opt-in protocol.
Periodically validate your database. Some companies will use old email addresses as spamtraps. Sending to an old email indicates you are not sending relevant emails to people who have opted in.
Review Prospect engagement. As a best practice, you should only send emails to newer or engaged Prospects. If a Prospect hasn't had any engagement (open email, visit website, etc.) in the past year, try to verify the Prospect's information before sending again.
Use double opt in. To make sure the emails in your database are valid, you can use double opt in. Learn more here.
To learn more on this subject, please see our documentation here.