Ok, so I found the issue. The isue with the v1.10.4 is caused now when the end-user have a HTML signature. When that happens, the content appear as {empty}.After some search, I fix the issue by comment the line 648 with the code: $input = preg_replace('/=({2})/ie', "chr(hexdec('\\1'))", $input); on file: "mimeDecode.php" located on the directory: osticket/include/pear/Mail and I replace it with: $input = preg_replace_callback('/=({2})/i', function($m) { return chr(hexdec($m)); }, $input);After that, everything backs to normal and the email content and HTML signatures (if they exists) are present as well.I hope that OSTICKET will solve this on the next release!Thanks for everyone and I hope that solve the issue with other ones.