My Ironport C300 is set up to check the validity of local recipients in incoming mail with a LDAP query.
In my mail system however, the postmaster e-mail address is not LDAP-checkable by default...
All postmaster mail for all our domains goes there, so it would need to check OK for several e-mail addresses.
So mail sent to postmaster is rejected for all but our main domain.
I tried adding "postmaster@" to the RAT, but this will allow postmaster mail even for non-existing domains.
I could try and add a [email protected] entry for each domain entry in the RAT, and tag it not to use LDAP, but that seems unclean and error prone.
What's the Right Way (tm) to do this ?
Is it possible to tell ASyncOS to ALWAYS accept postmaster@ adresses for local domains ?