In an effort to protect the users’ inboxes, both Gmail and Yahoo! have introduced a new set of requirements senders must meet by February 2024 for mail to be delivered as expected to their subscribers. Consequently, Google and Yahoo will implement new prerequisites for those sending bulk emails. These guidelines primarily focus on three main areas: ensuring the authenticity of outgoing emails, keeping track of reported spam levels, and simplifying the process of unsubscribing from email lists. Changes like enable one-click unsubscribe via the List-Unsubscribe header in their emails on Zenler side