What is whitelisted email marketing? Whitelisted email marketing is a list of email addresses or domain names that an email filtering program will allow email messages to pass through. Spam filters are the programs that are used to try to prevent unwanted email messages (spam) from being delivered to your inbox. Although these programs work well sometimes good messages are blocked and bad ones get through. Whitelisted email marketing is how to make sure that the good messages don’t get blocked. Whitelisted email marketing means sending mail from a source that has been identified by the end user and/or ISP’s as a trusted source means that they know where the email is coming from and they have agreed that they want to receive it.