I have an issue with UPLOADING attachements to a ticket that are larger than 2 meg. I have set the attachment upload to allow attachments and also to accept emailed files.
Please be sure you server is configured to accept large files. You can check in php.ini (or probably using phpinfo()).
The following are some excerpts from my php.ini looks:
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;
max_execution_time = 500 ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
memory_limit = 200M ; Maximum amount of memory a script may consume (16MB)
;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;
; Whether to allow HTTP file uploads.
file_uploads = On
; Temporary directory for HTTP uploaded files (will use system default if not
; specified).
;upload_tmp_dir =
; Maximum allowed size for uploaded files.
upload_max_filesize = 500M
Which is probably overkill.