Hi, please bare with me trough a long explanation before I request help. I've recently moved to México, and one of the requirements of the tax authority to let me work is that I give out digital receipts of every transaction I make / income I receive. This digital receipts are made online and automatically sealed (registered and approved) by the mexican IRS and result in 2 files: a pdf and an xml. I hired a small enterprise to do this for me. Their system is on the web and let me send the 2 files of the digital receipt by email. Now, certain companies I do work for, demand I include some other files with the digital receipt if I'm ever going to be paid, and I have to send the digital receipt to myself for processing before re sending to the stupid company that demands more things than the standard. The problem I've been having is that Apple's Mail on mavericks do not detect the xml file as an attachment, but instead displays it as text inside the body of the mail. If I send it to a non iCloud/mobileme/.Mac address, say gMail, and open it on a browser, it displays correctly as an attachment, but if I open that said mail on Apple's mail, it displays on the body of the email. Do not even get me started on opening the same email on an iPhone or an iPad, since it does not even recognizes the attachment and treats it as non existent. In the mac, I'm having to painstakingly copy and paste the text onto TextEdit (with the potential of error this represent) and save the file with an xml extension. So, after all this intro: Can anyone help me making Apple's mail to recognize xml files as attachments? I've already tried to change the app associated with xml files on the finder and restarting the mac, but to no avail. Maybe I'm doing something wrong? Any help is appreciated.