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)
TLE-BU; The Linux Experience, Back Up
Main Project Page: http://tle-bu.org
Community Forum: http://forum.tle-bu.org
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