On 8/2/2011 5:15 PM, Wietse Venema wrote: > Jason Gauthier: >>>> >>>> Good to know. Definitely meant REJECT, versus bounce. I used the >>>> phrase bouncer as a metaphor to the large bodyguards that >>>> stereotypically guard a club from unwanted guests. ;) >> >>> Do you know what 'xyz.com' will be doing with mail you send to them where >>> the address isn't valid on their system? >> >> Well, xyz.com will be mine. So I am not sending them email. I want to mak >> -e sure that once the domain is transferred that anyone who is emailing them >> -I can accept and the business can handle those customers appropriately. Eve >> -n though we do not know what email addresses are valid for that domain prese >> -ntly, and will have no way of knowing. > > What happens when Postfix accepts mail for a non-existent recipient > in xyz.com? > > a) Will you silently throw it away even if it is an honest typo, > leaving the legitimate sender in the dark? > > b) Will you return it to the sender as non-deliverable, even if 90% > will have a false sender address, and you're only making the spam > problem worse? > > If you accept mail without knowing that the recipient is valid, then > that is the choice that you have. > > Wietse
The example I supplied earlier showed how to enable recipient verification for the xyz domain using reject_unverified_recipient. This assumes, of course, that the xyz server correctly rejects unknown recipients. If it doesn't, then sell tickets to watch the train wreck. -- Noel Jones
