Hello [email protected],
Sorry for the problem with using Haraka for sending mail. We unfortunately are not experts in using Haraka (an SMTP mail server), but I did spend a little time looking for possible answers to your question. First, I would definitely look for spam scripts on your server. Then, if you are unable to stop the problems, then try asking questions from experts in forums using the software. This particular forum was giving update information on Haraka, that may prove useful for you. I hope this helps to answer your question, please let us know if you require any further assistance.
Regards,
Arnel C.