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On 2012-05-14 2:48 PM, Vinícius Ferrão <viniciusferrao@××××××××××.br> wrote: |
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> But I don't understand what can make my server a backscatter source. |
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> |
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> I'm not relaying from outside, and I only accept messages from my |
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> domain, |
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*From* your domain? Or destined *for* your domain? |
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> and only from my aging sendmail+dovecot server, so no relaying from |
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> outside. |
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Well, since you haven't proven any of your assertions, we have no way of |
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knowing. |
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You should be asking this on the postfix list, but we can probably help |
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you here too, if you are willing to listen... |
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First, we'll need full output of postconf -n... |
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> What I don't have is what you said: check for local recipients. But |
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> this is a problem? |
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If you accept messages to *any* address (including invalid recipients), |
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then that is what is causing the bounce messages. |
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If you only accept messages for valid recipients, the bounces stop. |
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Simple, no? |
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