On 12/30/2009 3:19 PM, Daniel L. Miller wrote: > Geert Hendrickx wrote: >> Then do the recipient domain validity check *before* accepting and >> queuing the message: put "reject_unknown_recipient_domain" in your >> smtpd_recipient_restrictions. This will make Postfix respond with: >> >> 450 4.1.2 <x...@y.z>: Recipient address rejected: Domain not found >> > You know, it's not fair to give me an answer that not only answers my > question - but eliminates the need for a complicated new project just > by proper configuration! Geez! > > Hmm...can I extend this and use reject_unverified_recipient? Or will > this cause problems?
It is not recommended to use reject_unverified_recipient for domains you are not responsible for. Reason: some people may take offense at your server checking addresses and put you on a personal blacklist. Also, the solution above is subject to transient DNS errors. Make sure your DNS source is rock solid.
