Asat meaning in mail

I think you meant "ASAP"!

ASAP is an abbreviation for "As Soon As Possible". It is often used in emails, texts, and other forms of communication to convey a sense of urgency or to request that something be done quickly.

For example:

• "Can you send me the report ASAP?"
• "I need the files by tomorrow ASAP."

In general, ASAP is used to indicate that something should be done promptly, without delay, or as soon as possible.