i am using redhat as4, and default sendmail-8.13.1-2. i want to install bm-milter, when i start bm-milter, it terminates, having line number 25 of file

/usr/local/sbin/bm-milter.pl

use Sendmail::Milter;

where do i find that sendmail having milter support is
installed, or without milter support?

Any one who used milter that reduce spam?

thanks

Yes i did and it worked well and this is what i did:
First, you must compile sendmail with MILTER defined. If you use a sendmail version older than 8.12 please see the instructions for your version. To do this, add the following lines to your build configuration file (devtools/Site/config.site.m4)

APPENDDEF(`conf_sendmail_ENVDEF', `-DMILTER')

then type ./Build -c in your sendmail directory.

Next, you must add the desired filters to your sendmail configuration (.mc) file. Mail filters have three equates: The required S= equate specifies the socket where sendmail should look for the filter; The optional F= and T= equates specify flags and timeouts, respectively. All equates names, equate field names, and flag values are case sensitive.
The current flags (F=) are:
Make sure you did the above.
Cheers