Envelope

It is typically depicted in a shade of light blue or white, with a red stamp in the top right corner.

When sent on social media, the envelope emoji is often used to represent sending a message or communication to someone. It can also be used to symbolize receiving a message or notification. This emoji is quite popular and is commonly used across all age groups, as it is a universal symbol for mail and communication.

The envelope emoji is most commonly used on messaging platforms such as WhatsApp, Facebook Messenger, and iMessage. It is also frequently used on social media platforms like Twitter and Instagram, where users may use it in captions or direct messages.

This emoji is not considered rude, as it is a neutral symbol for mail and communication. However, it can be used in a sarcastic or passive-aggressive manner, depending on the context and tone of the conversation.

The envelope emoji was approved as part of Unicode 1.1 in 1993 and has been a part of the standard set of emojis since then. It was originally created as part of the Wingdings font set and was later included in the Unicode Standard. The design of the emoji has evolved over time, with different platforms and devices using slightly different variations of the envelope, but the overall concept remains the same.

In conclusion, the envelope emoji is a widely recognized symbol for mail and communication and is commonly used on social media and messaging platforms. It is not considered rude and has been a part of the emoji standard for many years.