I am using ClamAV with ClamAV-milter support on my AMD64 FC3 box. Recently, I ran some tests on my mail server's virus scanning capabilities provided by http://www.webmail.us. Results: Test #24 (non-virus): Test for the "Partial (Fragmented) Vulnerability". <B>This does not include the Eicar virus</B>, however your mail server should still block this since a virus can use this technique to break itself into multiple emails, bypassing virus scanners, and reassembling itself in your inbox. (attachment can be opened by virtually any mail program) Test #25 (non-virus): Attachment with a CLSID extension which may hide the real file extension. <B>This does not include the Eicar virus</B>, however your mail server should still block this since the CLSID technique can be used to hide the true extension of a malicious file. (attachment can be opened by any Windows computer) So, be careful Leopoldo Olmos