On JavaStation systems, the right mouse button does not currently generate events to applets and applications. For this reason, MailView functionality in pop-up menus activated by the right mouse button are not available. This primarily affects folder management in the tree display in the upper left corner, and in attachments.
make sure that when the JavaStation clients are installed, there are proper entries in DNS for each client system. If the JavaStation client is not in the DNS maps, the user may not be able to send mail.
Temporary file space in /var/tmp can become full, causing append commands to fail. This may occur when large mail messages are sent, and the user gets an "Unable to send" error notice. More space is required in /var/tmp to resolve this issue.