"Hate mail," also known as "hateful letters" or "venomous messages," are written communications filled with vitriolic words. It's a form of bullying, harassment, or threatening behavior that inflicts emotional harm on the recipient. The term can also be swapped for "angry messages," "offensive letters," or "nasty emails." Regardless of how it's called, it is not acceptable in any situation. The use of profanity, racial slurs, gender stereotypes, or other discriminatory language in hate mail may lead to legal consequences. Therefore, it is imperative to be respectful and professional in all online and offline communications.