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292511Re: Is postfix misconfiguration to send to wrong domain?

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  • Jan P. Kessler
    Apr 11, 2013
      >> Is postscreen able to identify email as spam to prevent bouncing it?
      >> Is there a way to alter my postfix configuration to prevent bouncing it?
      > This is not a matter of 'spam detection'. You have to verify for valid
      > (means existing) recipients *before* you accept mail.
      > Look for reject_unlisted_recipient or reject_unverified_recipients in
      > the postfix docs.

      To be more precise:
      - verify your recipients
      - do not reject mails by content filters (as said: use prequeue filters
      or tag spam mails)
      - and most important: do not rewrite recipients to non existing
      third-party accounts (here: google)!

      Apr 11 05:15:23 mg04 postfix/smtp[28222]: 152B0661BC5:
      <mailto:mmoody7@...-google-a.com>>, orig_to=<mmoody7@...
      <mailto:mmoody7@...>>, relay=gmail-smtp-in.l.google.com
      <http://gmail-smtp-in.l.google.com>[]:25, delay=13,
      delays=9.3/0/0.22/3.2, dsn=5.1.1, status=bounced (host
      <http://gmail-smtp-in.l.google.com>[] said: 550-5.1.1 The
      email account that you tried to reach does not exist. Please try
      550-5.1.1 double-checking the recipient's email address for typos or
      550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1
      j8si3846254qaz.28 - gsmtp (in reply to RCPT TO command))
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