10 Email-Based Customer Support KPIs

Email Backlog #

The number of unresolved or unopened emails at any given time.

Email Case Reopen Rate %

The percentage of email cases that were marked as resolved but had to be reopened due to the issue not being adequately addressed.

Email Volume #

Email Volume measures the number of emails or inquiries your team receives via email during a specific time period.

Emails Per Resolution #

The average number of email interactions required to resolve a customer's issue.

Internal Response Time time

The average time taken for one support agent to respond to another agent's internal query or request related to an email case, in minutes.

Missed Emails #

The number of customer emails that were overlooked or not responded to.

Proactive Emails Sent #

The number of emails sent to customers proactively, not as a direct response to a customer's email.

Reply-to-Resolve time

The average time it takes from the initial customer email to the resolution of their query or issue (hours or days).