I'm using MSX 5.5 SP4 on Win2K machine. In my IMC outgoing Queue I see many emails the originator is <> and destination host is something like spamming domain. I belive it is spamming. I already set re-routing incoming options. I did also some spamming test it seems my Exchange server is secured. I can find any help on Internet also, I hope someone help me on this forum.