All caps in mail indicates

In email, all caps (uppercase letters) are often used to convey emphasis, importance, or to draw attention to a particular message. Here are some common uses of all caps in email:

1. Emphasis: All caps can be used to add emphasis to a particular word or phrase, such as "PLEASE RESPOND AS SOON AS POSSIBLE".
2. Urgency: All caps can be used to convey a sense of urgency or importance, such as "THIS IS A HIGH PRIORITY EMAIL, PLEASE RESPOND IMMEDIATELY".
3. Attention-grabbing: All caps can be used to grab the reader's attention, such as "IMPORTANT UPDATE: NEW POLICY EFFECTIVE IMMEDIATELY".
4. Shouting: All caps can be used to simulate shouting or emphasis, such as "WE NEED THIS INFORMATION BY THE END OF THE DAY".
5. Formal or official tone: All caps can be used in formal or official emails to convey a sense of formality or authority, such as "THIS IS A FORMAL REQUEST FOR INFORMATION".

However, it's worth noting that excessive use of all caps can come across as rude, aggressive, or even spammy. It's generally recommended to use all caps sparingly and only when necessary to convey a specific message or emphasis.