“Personally I aim for much lower, a goal of 20 – 30 characters has worked well in my testing, and certainly those with below 30 – 40 characters perform much better than those above.”

@chrisgarrett

Your email subject line length is of utmost importance, because it’s the first part of your message your readers see and it can mean the difference between your email ending up in the trash or not. The maximum subject line should be below 50 characters (including spaces and punctuation).