This idea has been merged into another idea. To comment or vote on this idea, please visit S1-I-267 Invoice Email - Subject Line make it editable, sameway as the email body text is editable.
I need to specify a custom email subject string such as:
[NUMBER] : [REFERENCE]
Rather then the default which is very long to read:
[COMPANY] - Quote ([NUMBER]) for [AMOUNT], on [DATE] (Expires on [DATE])