Wondering Why QuickBooks Outlook Is Not Responding? Find Here Connecting QuickBooks emails to Outlooks will make tasks easier for you. But the problem arises when QuickBooks puts up an issue while sending the emails to Outlook. An error’ QuickBooks outlook is not responding’ starts appearing that hails, “Sending email through Outlook: Outlook is not responding. Please try starting up Outlook and try again.” Maybe this error is trying to point at a glitch in your system or application or something else. To find these causes or glitches that lead to this QuickBooks Outlook error and the procedure to fix it, keep reading this insightful blog till the end.