Which of the following methods allows for a one-step unsubscribe?

The method that allows for a one-step unsubscribe is the one-click unsubscribe. This approach simplifies the process for recipients, as it enables them to opt-out of email communications with just a single action, typically by clicking a link in the email footer. This link leads to an immediate confirmation of their unsubscribe request, eliminating the need for additional steps, such as filling out a form or confirming through a second email.

One-click unsubscribe is crucial in enhancing user experience and improving engagement, as it minimizes friction and respects the preferences of the subscribers. It is in line with best practices for email marketing, focusing on user convenience and compliance with regulations such as the CAN-SPAM Act, which require a straightforward way to unsubscribe from marketing communications.

In contrast, other methods like manual unsubscribe involve multiple steps where recipients may need to navigate through different screens or forms, making the process less seamless. Feedback loops are mechanisms for email senders to receive notifications about complaints or spam reports from recipients, which does not directly facilitate the subscription management process. Reply mail typically relies on recipients sending an email to unsubscribe, which also requires additional effort and may lead to processing delays.