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Re: Spam pretending to be from a local domain

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  • mouss
    ... 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
    Message 1 of 7 , Apr 1, 2007
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      alex handle wrote:
      > On 3/31/07, Magnus B├Ąck <magnus@...> wrote:
      >>
      >> On Saturday, March 31, 2007 at 04:29 CEST,
      >> LuKreme <kremels@...> wrote:
      >>
      >> [...]
      >>
      >> > now, jfoc@... 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
      > (www@...).

      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@....) 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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