What Does Spam Trap Mean?
A spam trap is an anti-spam technique through which spam email and spammers are identified. The trap is essentially a honeypot that distinguishes spam by creating an email address configured to not receive email. Therefore, if messages come to this inbox, they can be assumed to be spam.
Techopedia Explains Spam Trap
The design principle behind a spam trap is very simple. A valid email is created and is kept private to the spam analyzer or legitimate persons. Besides the company or domain name itself, the email is not used anywhere for signing up for an online product or opting into a service. Since the email address is not configured, published or subscribed to receive email, all incoming emails are considered unsolicited or spam, which therefore helps to identify spam email and those who send it.