Question on notify emails

[sse450]

Hello,

amavisd-new-2.12.0 is working fine on my server. Using the below 
settings, it is sending notification emails to virus/spam admin.

$virus_admin               = "virusalert\@$mydomain";     # 
notifications recip.
$spam_admin                = "virusalert\@$mydomain";
$mailfrom_notify_admin     = "virusalert\@$mydomain"; # notifications sender
$mailfrom_notify_recip     = "virusalert\@$mydomain"; # notifications sender
$mailfrom_notify_spamadmin = "virusalert\@$mydomain"; # notifications sender
$mailfrom_to_quarantine = ''; # null return path; uses original sender 
if undef

Subject of the notification emailsis like in "virusalert\@$mydomain" is 
like below:

Spam FROM [205.201.135.209]:36390 
<bounce-mc.us5_16454359.380538-9728f3c036 at mail209.atl61.mcsv.net>

As the subject is the return address it is very difficult to make a search.

Is there a way to put From: email address instead of return path in the 
subject line?

Thanks.

Best wishes.