I am using FC1 as a mail server and use ClamAV to protect against viruses. Clam has killed around 200 emails in the last hour from a variety of hosts. Each email contained the Worm.SCO.A virus. What I need to know is: Is this a DoS or some other kind of concentrated attack and - if so - how do I combat it? Thanks in advance... Chris Gray --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.567 / Virus Database: 358 - Release Date: 1/24/2004