The folks who make the Boomerang app looked at email closings in more than 350,000 email threads, and found that certain email closings deliver higher response rates than others. The dataset consisted of messages from mailing list archives of over twenty different online communities.
The eight most popular email closings were:
- Best regards
- Thanks in advance
- Thank you
- Kind regards
Of the top eight, these were the most effective at eliciting a replay, in oder of effectiveness: