Did you refrain from sending jokes or other nonbusiness messages? (p. 256)
Did you keep the email as brief as possible and send it only to appropriate people? (p. 256)
Did you use the appropriate level of formality? (p. 257)
Did you write correctly? (p. 257)
Did you avoid flaming? (p. 257)
Did you write a specific, accurate subject line? (p. 257)
Did you use uppercase and lowercase letters? (p. 257)
Did you skip lines between paragraphs? (p. 257)
Did you check with the writer before forwarding his or her message? (p. 257)