A few parts to this question:
I have a container field in invoices that holds a PDF of the invoice to send out. I want to have a button called send that sends the pdf via attachment in an email. Whats the best way to do this as the way I do it by hand is to export the said pdf and then attach that to the email.
Secondly If I can automate all this, when it opens up the email, is there any way that I can get it to put the text in already and the email address?
Thirdly, I'm not sure if it's possible to do this, some of the users have multiple email addresses for different clients, is there a way of specifying the from address?