What is an unprofessional practice to avoid when emailing professors, as it may show aggression?

Writing in all capital letters is considered an unprofessional practice to avoid when emailing professors because it can be interpreted as shouting or expressing anger. Email communication often lacks the verbal and nonverbal cues present in face-to-face interactions, making tone and formatting even more crucial. When a message is written in all caps, it may convey a sense of urgency or aggression, which can be off-putting and may lead to misunderstandings regarding the sender's intentions.

Using polite language, being concise, and sending follow-ups in moderation are generally accepted practices that can foster effective communication. Polite language helps in establishing a respectful tone, brevity ensures clarity, and appropriate follow-ups can demonstrate diligence and interest.