A body of text should avoid the caps key, exclamation points, and question marks. While email writers frequently intend capital letters and extra punctuation to convey added emphasis, it is better to use italics to emphasize a particular phrase or key word in your email. Adding all-capital letters and extra punctuation to an email can make the email sound like the sender is excessively angry.
In text-based idioms, it is important to use cool, short, and succinct language. Make sure that you are polite, use an appropriate greeting, and respond to negative feedback or concerns in a cool, collected manner.