Re: ubuntu-users Digest, Vol 44, Issue 168

On Wed, 16 Apr 2008 11:39:01 -0400, Albert Charron wrote:

Aart Koelewijn wrote:
On Wed, 16 Apr 2008 09:12:03 -0400, Albert Charron wrote:


Chris.Masih@xxxxxxxxxxxx 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...

It isn't mine either.

It should be impossible to reject a message based on something written in
the message like swear words. To know what is written in a message you
will have to read it and to be able to read it you will have to accept
it. Once it is accepted you can't reject it anymore; you can send it to a
special spambox (which is what my ISP does), send it to /dev/null or
bounce it, which you should not do because of reasons stated above. My
ISP also had the possibility to make a white-list. Emails from senders on
that white-list are not checked for spam. This is a feature often used
for mailing-lists as some of them tend to get a high spamscore.

Anyway, I prefer to read this mailinglist and write to it through the
newsgroup gmane.linux.ubuntu.user. No problems with spamfilters that way.

Aart


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