Currently, i am working on one project related to x-cart. and what i found is there is no any functionality regarding add attachment to the email. I want to attach one pdf with mail. and I didn't found any solution regarding this. is there any facilities regarding this in x-cart. or is it already in but I am not aware of it?
untill i know x-cart allows two types of mail sending. you can send simple mail using php mailer with attachment. don't use xcart's personal mail system. i have faced it too. and made solution with php mailer. xcart have no any free modules to send mail with attachments.