Fill in the blank: The ideal length of an email subject line is _____ characters. By vmartinez Fill in the blank: The ideal length of an email subject line is _____ characters. 41–50 55–75 10–20 75–100 Related content Related questions:Fill in the blank: The ideal blog post title is…___________ characters is the average character…Adding the first name of the contact to the email…True or false? According to this course, the…