I have to suggestions for the Mail Plugin:
method “removeAttachments”. Often, I have to send twice the same Mail; once to the enduser and once to the site administrator. The site admin should get the attachment, the enduser not. If I first send the Mail to the administrator and do a “addAttachments”, they cannot be removed before sending to the enduser.
general method to use the option “remove=true” in Mailattachments (introduced in CF 8.0.1)