I am having so much spam going through my server I cannot keep up with deblacklisting.

I dont understand how this is happening. I have access restricted to sending email via registered account logins and not MTA trusted networks.

Here is the most recent spam sent via my zimbra server today:

Jan 8 04:22:11 newmail postfix/qmgr[29990]: 98E4E1120431: from=<office@massory.lv>, size=2474, nrcpt=3 (queue active)
Jan 8 06:49:01 newmail postfix/qmgr[29990]: 0C96011204D8: from=<office@massory.lv>, size=1818, nrcpt=3 (queue active)

Jan 8 06:49:01 newmail amavis[8211]: (08211-16) ESMTP::10024 /opt/zimbra/data/amavisd/tmp/amavis-20120108T060644-08211: <office@massory.lv> -> <sgtkmitth@aol.com>,<serviicess@live.com>,<fiasalg ill@yahoo.com> SIZE=1818

Received: from mail.edited.com ([]) by localhost (mail.edited.com []) (amavisd-new, port 10024) with ESMTP; Sun, 8 Jan 2012 06:49:01 -0500 (EST)
Jan 8 06:49:01 newmail amavis[8211]: (08211-16) Checking: weSXnkG5+Lwk [] <office@massory.lv> -> <edited@aol.com>,<edited@live.com>,<edited@yahoo.c om>

Jan 8 06:49:06 newmail amavis[8211]: (08211-16) FWD via SMTP: <office@massory.lv> -> <edited@aol.com>,<edited@live.com>,<edited@yahoo.c om>,BODY=7BIT 250 2.6.0 Ok, id=08211-16, from MTA([]:10025): 250 2.0.0 Ok: queued as 4B3F411204D9

Does anyone know what is happening here? I have to stop it and I do not have this issue with my non zimbra servers?