Re: [courier-users] multiply mail-addresses problem

Gordon Messmer wrote:
>>
>> Ok. I'll ask from another side.
>> Can I configure Courier not to tell me about the wrong addresses? Even if
>> my
>> mail client very bad?
>
> Yes, it can, but not selectively. That is, if you want courier to be
> quiet about bad addresses, and bounce them, it will behave that way for
> your users and also for the internet at large. What will then happen is
> spammers will attempt dictionary attacks against your mail server to get
> valid addresses, and will generate all positives. They'll then send
> huge volumes of spam to your server, which courier would accept and then
> try to bounce. The spam would have a bad return address, and then sit
> undeliverable in your mail queue for a very long time before bouncing to
> the postmaster.
>
> The end result is that you can't read postmaster mail because there are
> too many messages, and you can't determine whether or not there's any
> valid problems with your mail server. The problem increases until your
> mail queue is full of thousands of messages which can't be delivered,
> and legitimate service degrades until it's not usable any more.
>
> Don't go down that road. It sucks.

Ok, thank you very much! I understand now.

Anton.


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