The easy notification email you receive with the option to release/permit or block the email sender helps the user to avoid going through deep technical aspects to release any email. Review collected by and hosted on G2.com.

there's nothing much to dislike as the interface is straightforward with the options. Maybe if they bring some of the key features like "permitting domains/emails" on the add-in of your email program. Review collected by and hosted on G2.com.