Mail messenger

You're referring to the classic messaging app!

Mail Messenger, also known as MSN Messenger, was a popular instant messaging service developed by Microsoft. It was first released in 1999 and was widely used in the early 2000s. The service allowed users to send text messages, files, and multimedia content to friends and family, as well as engage in voice and video conversations.

Some of the key features of Mail Messenger included:

1. Instant messaging: Users could send and receive text messages in real-time.
2. File transfer: Users could send files to each other, including documents, images, and audio files.
3. Voice and video chat: Users could engage in voice and video conversations with each other.
4. Emoticons and stickers: Users could add emoticons and stickers to their messages to add a touch of personality.
5. Group chats: Users could create group chats to communicate with multiple people at once.
6. Status updates: Users could update their status to let friends know what they were up to.

Mail Messenger was eventually replaced by Microsoft's Skype service, which offered more advanced features and a broader range of communication options. However, many people still fondly remember using Mail Messenger in the early days of instant messaging.