ubuntu-users Digest, Vol 44, Issue 168

[Albert Charron]

Aart Koelewijn wrote:
> On Wed, 16 Apr 2008 09:12:03 -0400, Albert Charron wrote:
>
>   
>> Chris.Masih at crawco.co.uk wrote:
>>     
>>> hey guys
>>> please do me a favour and hash out any swear words cos otherwise emails
>>> can be blocked at
>>> my work address, im sure im not the only one who would have this
>>> problem cheers
>>>       
>> I have the exact same problem with my mail host. They run spam filtering
>> at the SMTP level and I often get kicked of the mailing list because of
>> bounced e-mails. This is really annoying, but I have to admit it is less
>> annoying than have hundreds of spam e-mails per day hitting my
>> mailbox...
>>     
>
> They should never bounce what they think is spam. The return address of 
> real spam is almost always fake. My internet connection was once was 
> completely useless because it was flooded with bounced spam to a faked 
> address in my domain (which I off course rejected because the address did 
> not exist, and then often got back bounced again)
>
> Aart
>
>
>   
Well. They don't EXACTLY bounce the messages. They refuse the connection 
on the SMTP server before the message is accepted, then the sender's 
server is sending back the NDR. The difference is that with the bounce, 
the server would have accepted the message and then sent back the NDR 
itself.

By RFC, you have to send a NDR on rejected messages you accepted with a 
reason for the rejection... If you reject the message at the connection 
(based on server's IP for example), you still have to give a reason for 
the rejection, but no NDR is sent directly...

Sorry if I'm confusing, English isn't my main language...

-- 
+--------------------------------------+
  Albert Charron
+--------------------------------------+
  Linux Counter member #157482
  Registered computers: 195048, 361906
+--------------------------------------+

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