>Keep in mind that some mail servers accept all email for delivery at the >SMTP level, and then bounce later... I looked into doing this very same >thing, but all of my customers that weren't running IMail were running >Exchange, and Exchange would just accept all email, so I didn't enable >RAV because it would have just bloated my DB.
If your postfix must relay to a next-hop that is a black hole, then except them in relay_recipient_maps = to_relay_recipients_dunno.map, to_relay_recipients.map, where the _dunno file has those domains: @domain.tld ok btw, on the Imail list, they said there was a setting in Exchange to make it reject unknown recipients in the SMTP dialog (rather than accept all and bounce unknown recips), so address_verify_transport_map would work for them. If the address_verify.map.db gets too large (limit of about 1.1 GB on fbsd), then drop hash: db type and use Berkeley db, (as is required for postgrey's large .db files). I use berkeley 4.1. Len
