How to Fix QuickBooks Closing When Sending Emails If QuickBooks closes while sending emails, it may be caused by incorrect email setup, outdated software, or conflicts with Outlook. Updating QuickBooks, repairing the installation, and verifying SMTP settings typically solve the issue. Running the program as an administrator and adjusting security software permissions ensures smooth email delivery and uninterrupted workflow for accounting tasks. -------- https://www.apsense.com/article/863108-effortless-fixes-for-quickbooks-closes-when-sending-email.html