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- Maybe in reply to: LuKreme: "Re: Spam pretending to be from a local domain"
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From: mouss (no email)
Date: Sun Apr 01 2007 - 07:17:33 EDT
alex handle wrote:
> On 3/31/07, Magnus Bäck <> wrote:
>>
>> On Saturday, March 31, 2007 at 04:29 CEST,
>> LuKreme <> wrote:
>>
>> [...]
>>
>> > now, is not valid, so is there something I can set in
>> > postfix that will reject mail from unknown local users, or is there a
>> > reason I should not do this?
>>
>> http://www.postfix.org/postconf.5.html#reject_unlisted_sender
>> http://www.postfix.org/postconf.5.html#smtpd_reject_unlisted_sender
>>
>>
> I have implemented reject_unlisted_sender with warn_if_reject.
> Be careful i got a lot of false positives. Watch for bulkmailers, your or
> your customers webservers
> ().
then the thing to fix is these mailers. reject_unlisted_sender is safe
and sane. you don't want to send mail that can't get a bounce in case of
errors, or can't replied to. if the bulkers don't want people replying,
provide them with one address (some people use noreply at dot dot dot dot ) that is
forwarded to you or some administrative account. but a -owner style
address as the envelope sender is appropriate here.
>
> [snip]
>
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