On 2014-03-25 postfix-users@postfix.org wrote:
> Ansgar Wiechers wrote:
>> On 2014-03-25 postfix-users@postfix.org wrote:
>>> I was suspecting this already:
>>>
>>> Mar 25 12:16:56 HOSTNAME postfix/smtpd[6243]: connect from
>>> unknown[180.93.167.227]
>>> Mar 25 12:16:58 HOSTNAME postfix/smtpd[6243]: disconnect from
>>> unknown[180.93.167.227]
>>>
>>> Something seems to get through possibly should not?
>>> I have no idea, what i should fix :-(
>>
>> Some host connects to your mail server, then disconnects from your
>> mail server. Apparently without doing anything else. What problem do
>> you perceive here that would require fixing?
> 
> Now, i cannot see, that this connection does or tries ...
> I thought to block such things - like rejecting "unknown" clients /
> senders as early as possible.

Your server would have to be psychic to detect that a client won't do
anything before it actually disconnects without having done anything.

> Not needed?

No.

Regards
Ansgar Wiechers
-- 
"Abstractions save us time working, but they don't save us time learning."
--Joel Spolsky

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