We have postfix configured for sending mails.
We have a internal SMTP server and a relay SMTP server, both configured with postfix.

We are facing issue that the user sending the mails are getting too many mails back, with postfix error codes in 400 and 500 series.
Since the 400 series errors are not very critical we want to make some setting that the mails for errors in 400 series should reach one e-mail id and mails with errors in 500 series reach another e-mail id.

Is this possible ?
If yes, please suggest how can we do this.