The Zarafa dagent is extended with a debug option. When enabling the option the raw RFC822 email file of all incoming is stored in the specified directory. When the delivery fails or the email has a strange format after the delivery, Zarafa Support will ask often for raw email files to further debug the issue. With the option saving the raw emails files will be much easier. To use the option add the following options in the dagent.cfg.

log_raw_message = yes
log_raw_message_path = /tmp

By default the option is disabled.