We are more likely to send emails with errors on Mondays when we are feeling the blues about coming back into the office after the weekend. Try sending your campaigns out on a different day.
The more errors in an email subject line, the less likely it will get a response. Email subject lines without errors received a reply 34 percent of the time while those with errors received a reply 29 percent of the time.
The most significant email campaign error was starting a subject sentence with a lowercase letter which got a reply 28.4 percent of the time, compared to a 32.6 percent response rate for email subjects with proper subject capitalization.
Email users could be one shift keystroke awake from boosting their response rates by 15 percent.
Emails written at a 3rd grade reading level deliver a 36 percent improvement response time lift over emails written at a college reading level and a 17 percent higher response rate than emails written at a high school reading level.
Positive words like great, wonderful, delighted, and pleased, or negative words like bad, hate, furious, and terrible generate 10-15 percent more responses than completely neutral emails.
The sweet spot for email length is between 50-125 words which give response rates above 50 percent. Above 2500 words, do not expect a response rate above 35 percent.
Not only do emails sent on Mondays have the lowest subject sentiment on average, there is a steep drop off from Sunday, which has the most positive email sentiment.