[cobalt-users] Sendmail features

["Martin" <mbruinsm@xxxxxxxxxx>]

Hi,

could somebody come up with some suggestions for the following problem?
I have a user on my cobalt, say abc@xxxxxxxxxx, that I do not want to
receive any email for because of the amount of spam coming in on that
useraccount. Removing the user from the cobalt is not an option, neither is
installing some anti-spam software. What I did is edit the virtusertable and
instead of delivering the email to abc, I bounce the emails with 'error:
nouser'. It works fine, but I guess it is not the best solution because the
emails bounce and since alot of spam does not have a valid sender, the
emails just keep bouncing back and forth, don't they?
So I searched the archives, and I read a post about somebody saying it can
also be done with the sendmail Feature blacklist_recipients, which would
just bounce the emails without making them bounce back to my cobalt (valid
users *can* read the bounce notification, spam without valid sender
can't??). Could somebody please explain me how this works? Why would
blacklisting the recipient not make the messages bounce back and forth?
Also, I couldn't get it working. I edited the cobalt.mc file and added the
Feature, but I guess I would have to somehow recompile or reconfigure
sendmail, wouldn't I? Any help would be appriciated....

Thanks alot in advance,

Martin