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From: Wietse Venema (wietseporcupine.org)
Date: Mon Jan 07 2008 - 21:06:15 CST
> Is there a way to verify recipient domains for relay domain only? We
> have several domains we accept mail for local storage (virtual
> transport) and several others for which we are an MX backup (relay). For
> the relay domains, I would like to perform recipient address
> verification before accepting the mail, to avoid queuing mail for users
> who do not exist on the end server.
> The only command I can see to do this is reject_unverified_recipient,
> which as far as I can tell affects address classes. And I don't really
> want to do verification on all my virtual users. Is there a way around this?
Will apply recipient address verification for local and relay
And in practice that will be close enough.