Been blacklisted >_< Was: Re:Is this spam coming from inside my network?

Madison Kelly linux-5ZoueyuiTZhBDgjK7y7TUQ at public.gmane.org
Mon Feb 13 20:23:07 UTC 2006


G. Matthew Rice wrote:
> Madison Kelly <linux-5ZoueyuiTZhBDgjK7y7TUQ at public.gmane.org> writes:
>>    How could I check to see if I am an open relay? I've tried sending mail
>>    through that server (mail.tle-bu.org is an actual server on it) and I
>>    didn't authenticate from home (good thing). That was a pretty simple test
>>    though; do you have any more advanced things I could try in order to
>>    figure out what happened/is happening?
> 
> Try this:
> 
>         telnet ipaddr smtp
>         ehlo somedomain.com
>         mail from:<some address>
>         rcpt to:<some other address>
>         data
>         Subject: some subject
>         From: some address
>         To: some other address
> 
>         test
>         .
>         quit
> 
> You can fiddle with somedomain.com, some address and some other address.  A
> really good open relay doesn't even care if the mail from/ehlo commands are
> even for a local domain.  As well, the mail from/rcpt to addresses don't have
> to match the ones in the data.
> 
> I tried to do this for you but I get this:
> 
>     matt at brando:~$ telnet mail.tlu-bu.org smtp
>     telnet: could not resolve mail.tlu-bu.org/smtp: Name or service not known
> 
> HTH,

Damn, typo...

'mail.tle-bu.org' (not 'tlu-bu')...

I'll have to try that tonight because I am at the office which is 
allowed to relay mail. Thanks for the reply!

Madison

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           Madison Kelly (Digimer)
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