Allow me to provide some information about customer email character spacing via QuickBooks Online.
Each field in your QuickBooks file has a maximum number of characters that can be entered.
Item name may contain special characters but it is recommended that the first character not be a special character. While the Memo field can contain 4095 characters, only 30-60 characters will display on printed checks depending on print settings. 96 characters will display on a Transaction Detail report. While the Notes field on the timesheet can contain 4095 characters, only 96 characters will display on the Time by Job Detail report.