Terry,
> I have a small filter app that adds a message header containing the
> message size both in bytes and as a string of asterisks (available here:
> http://www.cnysupport.com/index.php/source-code/postfix-message-size-header
>-utility).
>
> It's a small C app that runs as a filter. It reads the message from
> stdin, prepends the above headers, then writes to stdout) Right now it
> runs as:
>
> filter unix - n n - - pipe
> user=filter argv=/usr/bin/spamc -e /usr/sbin/ContentFilter -oi
> -f ${sender} ${recipient}
>
> since I'm feeding spamassassin directly, however I'd like to switch to
> amavisd-new, which will then call spamassassin and the AV scanners.
>
> Does anybody have any idea how I could get amavis to pass each message
> though the filter, regardless of whether or not it's spam or infected? I
> use it to hold/reject messages that exceed the size allowed by some
> downstream mail processing applications.
If all you need to do is to add two header fields based on mail size,
the simplest way is to call add_header() from a custom hook, e.g.:
somewhere in amavisd.conf add:
include_config_files('/etc/amavisd-custom.conf');
then in /etc/amavisd-custom.conf :
package Amavis::Custom;
use strict;
# invoked at child process creation time;
# return an object, or just undef when custom checks are not needed
sub new {
my($class,$conn,$msginfo) = @_;
my($self) = bless {}, $class;
my($mail_size) = $msginfo->msg_size; # mail size in bytes
my($mail_size_mb) = $mail_size/(1024*1024);
my($hdr_edits) = $msginfo->header_edits;
$hdr_edits->add_header('X-ActualMessageSizeBytes', $mail_size);
$hdr_edits->add_header('X-ActualMessageSize',
'*' x ($mail_size_mb > 50 ? 50 : $mail_size_mb));
$self; # returning an object activates further callbacks,
# returning undef disables them
}
1; # insure a defined return
Mark
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