[wellylug] Regex question

[Darryl Hamilton]

Hi

Does anyone know if this is possible in a single regex? (I'm guessing 
not, but it can't hurt to ask)

What I'm wanting to do is match any email address with MAILER-DAEMON or 
postmaster but only if the domain isn't a 'whitelisted' one.

(mailer-daemon or postmaster) @ (anything except 'domain.co.nz')

I got as far as this

/(MAILER-DAEMON|postmaster)@!(domain\.co\.nz)/ (takes ! as a matchable 
character)
/(MAILER-DAEMON|postmaster)@(domain\.co\.nz)?/ (zero or one, close but 
not close enough)
/(MAILER-DAEMON|postmaster)@(domain\.co\.nz)??/ (supposedly valid, but 
couldn't get it to work either)

Anyone got any ideas, or am I expecting too much? :)

d.