If you're unable to send and receive emails and Malwarebytes Privacy is on, check if your email client is using port 25 to communicate. Malwarebytes Privacy blocks port 25 because it is an unsecured port commonly used for email spam.
To resolve this issue, change your email client to use port 465. If you need assistance, contact your Internet Service Provider (ISP) to assist you with changing the port number.
Note: You should not encounter this issue if you are using a web browser to send and receive emails.