What happens if I send an email to a spam trap?

Sending to a spam trap alerts blocklist operators and mailbox providers that your list acquisition or list maintenance practices are flawed. Depending on the type of trap and frequency of hits you may face throttling spam placement blocking or reputation damage.

One hit is a warning. Repeated hits are a red flag.

It is like running aground on a marked hazard. The more often it happens the more the harbor assumes you are not fit to navigate.