Avast configuration

Avast Free Antivirus / Premium Security
1

I use avast! for 2 monthes : good product.
Today, I’ve had an e-mail with Damaru-Y virus detected by avast.
In Internet Mail configuration ( Heuristic ), if I set it to High the subject structure is not set ( in help, it’s written :

High. In addition to the preceding:
Subject structure check. avast! checks if e-mail Subject does not contain bigger amount of nonsensical characters, which is always suspicious. E.g. if the subject contains character sequence “<?&$^(^%#$%*_()”, warning will be displayed…

To have this control active, I must use “custom” and then check “subject structure check”.

Can someone tell me why Subject structure check is not active in High mode ?

2

Because it’s not the default for High?

3

When I set Heuristics setting to High, I have :

  • Basic attachments check
  • According to name and Content-Type
  • Check whitespaces sequence
  • Maximum admissible length of sequence: 5
  • HTML part check - local iframe
  • HTML part check - remote iframe
  • Thorough check of attachments
  • Outbound messages - Time period check
  • Checked time: 30 s.
  • Warning count: 5
  • Check according to subject
  • Check according to attachments
  • Outbound messages - Mass messages
  • Absolute count (TO,CC,BCC): 10
  • Relative count (Address book): 20 %
  • Minimal count: 10

but not

  • Message structure check

which is only available with custom.

In Help, message structure check comes with High.

Am I right or is there a little problem somewhere ?