How to stop sending the bounced email to the sender?

[Magda Hewryk]

Hi,
We are getting hundreds of emails in the mqueue on our gateway.  Those
emails are from MAILER-DAEMON from our server to the 'fake' addresses.

What I don't want to happen is for each bounced email to return to the
sender

I've set Spam Action under MS to 'deliver' only and took off the bounced
option at the initial MS setup.  However we (postmaster) still getting
hundreds of bounced and undelivered emails.
How to stop it?  I believe I need to tune up and to change Sendmail options
in sendmail.cf file, not MailScanenr.conf file?

Any hints what should I fix to stop sending back the bounced emails to the
sender?

Regards,
Magda