Hi Redinit, I didn't said it secure Server, but secure being infected. Its not only for Mail server. its for whole server files. ClamAV is an antivirus for both Linux/Windows. why you given wrong guidance to peoples if you don't know what you talk about ? Do you know the meaning of ClamAV ? it means, Clam Anti Virus. and Rkhunter or CHROOTKIT doesn't protect, its just provide you report's nothing else. Hope it make sense.