Hey guys, got a bit of a mystery issue I've never seen before and thought perhaps someone here has experienced it and would know what's going on. Every time my dad sends an e-mail in Apple Mail using his company e-mail address, the e-mail shows up in the recipient's inbox with none of the previous messages from that e-mail thread. Instead, it appears as a new e-mail BUT with a basic text doc attachment that HAS all of the previous messages inside of it. Does anyone have a clue why Apple Mail is taking the past messages from an e-mail and converting it into an attachment when it sends? The attachment is always named something like ATT00001.c -- see attached screenshot of it. Anyone have any ideas how to fix it?