Email attachment == Virus?

I got the following message today from a client’s email server when I tried to send a ZIP file:

This is an automatic message from the Guinevere Internet Antivirus Scanner.

A message was received from you with a subject of  FW: 360 package for FDR The message was addressed to <email address removed>.  The message apparently contains a virus.

You will want to consult with your system administator on how to deal with this.

We take that kind of thing very seriously and spent an hour running the ZIP file itself and the individual components through every virus scanner that we have.  No virus.  We finally determined that the client’s system is stripping binary attachments.  Fine.  Strip the binary attachments.  But please don’t say “the message apparently contains a virus” just because it contained a binary attachment.  Sheesh!