Disturb,

This is a spam issue going by what I have seen? I believe that your anti virus software will still do its job, as it is not really looking at the header, it is looking at message bodies and attachments.

AFAIK there is no virus that arrives in the message header.

Spam filtering is usually based on the content (or lack of content) of the header. Up until this recent trend, this was quite adequate, and to scan the body or attachments would take too much additional resource?

For example, if I filter for "viagra"...........an accent over the "i" or "a" makes it a different word, so it gets through.

The problem is that some filters do not support accented characters, so you cannot add them to the filter. Also this has started recently, so admins who have filters that do support this have been caught unawares.

It's a war I am afraid mate



Cheers