Whitelisting server "non-deliverable" notices

[Nikolaos Milas]

Hi,

I would like to ask: is there a way an (incoming) mail gateway server 
(i.e. a server accepting incoming mail for an organization) to somehow 
detect/understand genuine non-deliverable notices and avoid blocking 
them as spam?

These non-deliverable notices occur due to mail sending by the outgoing 
mail server our organization (postfix/dovecot); if there is any problem, 
the remote servers may reply with such notices, which in turn reach the 
incoming mail gateway servers of our organization. These servers, 
running postfix/amavis/clamav/spamassassin, usually block such responses 
which, however, may be useful to the original sender.

I see a lot of such notices in the quarantine.

How do you handle this issue in your setups?

Thanks,
Nick