Is it appropriate for businesspeople to write goodwill messages expressing thanks or sympathy to business aquaintances?

Yes, it is appropriate for businesspeople to write goodwill messages expressing thanks or sympathy to business acquaintances. Such messages can strengthen professional relationships and demonstrate empathy and appreciation. They help foster a positive corporate culture and can enhance goodwill, making future collaborations more likely. However, it's important to maintain a professional tone and ensure that the message is sincere and context-appropriate.