Hello again,

I found a nice solution to avoid NDRs.

First create a file "/etc/postfix/validrecipients". In this file you create for 
each valid recipient one line, like: "[EMAIL PROTECTED] OK"

Then run "postmap validrecipients",

And then add "relay_recipient_maps = hash:/etc/postfix/validrecipients" to 
/etc/postfix/main.cf.tmpl and restart postfix.

After this EFW does only accept mails for recipients in the validrecipients. If 
another recipient is used, EFW makes error 550 during SMTP-dialog and does not 
send any NDRs.

If someone knows, how to use ldap instead of a file, I would be interested.

Greetings
Martin


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