return mails to non existing emailaddresses

[harpert]

How can I set Exchange to return email send to non existing users?

Now all mail is received and handeld by spamfighter exchange module and GFI antivirus. Since over 85% of all mail is either just SPAM or send to non existing users, I would like to delete all.

thanks harpert

 

[paulha]

return email ?

just delete it out of your badmail folder.

 

[Zelandakh]

set up spf checking and put an spf entry for your domain. Have your anti spam use ldap or AD lookups first and delete non matching.

 

[58sniper]

Configure the IMF for tarpitting and recipient filtering, and the server will bounce mail destined for non users.

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP
Want to know how email works? Read for yourself -

http://www.ietf.org/rfc/rfc2821.txt