text_combined: mark martinec xjukpdhxtcwlclorxjugvcceaschallengecc jakub finally tcpdump problem described time ago binary capture easier analyze tcpdump 0 w ddump written looks like mua sends find byte sequence 0d 0a 2e 0d 0a tcp dump havent looked closely enough crlf end packet remaining crlf beginning next one perfectly valid smtp end data indicator mark fri 08 aug 2008 144448 0100 mail attachements truncated