I think it would be a good idea to have a priority button on the email function, if people are waiting for your quote/invoice a flag next to it will get there attention and the email will not get los...
I think a Red Flag option should be available when we send emails as I have had comments that the emails don't stand out and can get overlooked, or they think they haven't received it.
Cheers
Jacqui
Coastal Detail Joinery