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Re: Accepting email regardless of address
From: Noel Jones <njones_at_nospam>Date: Tue Aug 02 2011 - 23:16:04 GMT
To: postfix-users@postfix.org
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