Which method is NOT used to send notifications?

Instant Messaging is typically not considered a standardized method for sending notifications in the same way as SMS, Email, or Alternative Email. SMS and Email represent conventional and widely used channels for notifications, where SMS is specifically suited for short, direct messages to mobile devices and Email allows for more detailed information to be sent directly to a user’s inbox. Alternative Email refers to using a different email address for notifications, which could cater to different preferences or use cases, furthering the traditional email method. Instant Messaging, while it can be used for real-time communication, is less formal and often relies on specific platforms or applications that may not be universally adopted across all users or organizations, making it less reliable as a standardized notification method.