Quoting Michael <p...@nettrust.co.nz>:
I have a couple of mail servers that act only as SMTP relay, and SMTP backup
servers.
How can I reject invalid recipient addresses at these servers?
I have investigated the manual on local_recipient_maps, however it appears
that this is only useful for email where the machine involved is the final
destination.
In this case these 2 machines operate in a load-balanced manner, forwarding
email onto the final server, or in a few instances acting as an MX20 backup.
I can make available to these servers (via SQL replication) a list of 'valid'
email addresses from the destination mail server(s), how can the
valid/invalid address accept/deny be deployed?
See address verification (verify) at postfix documentation
--
Eero