Loading ...
Sorry, an error occurred while loading the content.

Re: Virtual aliases pointing to non-existent virtual mailboxes

Expand Messages
  • Axel Luttgens
    ... Hello Wietse, You must have been reading my mind... I was indeed trying (agreed, a bit confusingly) to check whether I could have overlooked some
    Message 1 of 3 , Jul 3, 2013
    View Source
    • 0 Attachment
      Le 3 juil. 2013 à 16:23, Wietse Venema a écrit :

      > [...]
      >
      > If you want immediate verification, use reject_unverified_recipient.
      > This does a lot of work behind the scenes and then caches the result.
      > http://www.postfix.org/ADDRESS_VERIFICATION_README.html#recipient
      >
      > Having Postfix do full address resolution for every RCPT TO command
      > would make Postfix more vulnerable to denial-of-service attacks,
      > because sending RCPT TO is much cheaper than recursively resolving
      > multiple levels of address rewriting or aliasing that happens in a
      > bunch of different processes from cleanup(8), trivial-rewrite(8),
      > to local(8), virtual(8), lmtp(8) and so on.

      Hello Wietse,

      You must have been reading my mind...

      I was indeed trying (agreed, a bit confusingly) to check whether I could have overlooked some intermediate between the quick smtpd_reject_unlisted_recipient and the heavyweight reject_unverified_recipient.

      Many thanks for your thorough reply,
      Axel
    Your message has been successfully submitted and would be delivered to recipients shortly.