Mail to unrecognised users should be denied not bounced

[MatthewPearson]

Have installed Zimbra and am very happy with it. Only one thing remains:

The server accepts mail to anyone in our domain whether they exist or not. I have tried the postconf -e something_unrecognised_users=yes as was suggested in another post (I entered the command correctly at the time even though I can't remember it totally now). However this made no difference.
Also I am getting the warning warning: do not list domain ourserver.ourdomain.com in BOTH mydestination and virtual_mailbox_domains

Can anybody help. I don't want my server to be used to send undeliverable notifications to people unnecessarily (e.g. for spam purposes).

Thanks

Matt Pearson

[MatthewPearson]

I followed the instructions in http://wiki.zimbra.com/index.php?tit...r_spam_trap%3F
to create a 'Spam hole' that throws away all mail it receives. I then set-up lots of aliases so that commonly spammed addresses do accept mail (without bouncing), but just throw away the messages.

It was the
POSTCONF smtpd_reject_unlisted_recipient yes
change in zmmta.cf that I tried (and the associated postconf commands) that made no difference to whether or not messages are bounced for my domains when the recipient doesn't exist. I wonder if this is because I have a few domains that are aliases to the master domain, is it the alias domains accept the mail and then the master bounces it?

Any help would be great