There are a number of potential penalties that can be levied against companies who engage in wrong email marketing practices. These can include fines from regulatory bodies, damage to reputation, and lost customers.
Fines from regulatory bodies such as the FTC or DOE can range anywhere from a few hundred dollars to millions of dollars, depending on the severity of the infraction. In some cases, companies may also be required to change their email practices in order to come into compliance with industry best practices.
Damage to reputation is another possible consequence of engaging in wrong email marketing practices. This can occur if customers feel misled or deceived by emails they receive from a company. In some cases, this damage to reputation can be difficult or impossible to repair.