John,
Thanks. I didn't find anything on either site that described an open relay hole
I have that should be plugged. The only thing I found that might be causing it
is one line in my sendmail.mc file:
dnl FEATURE(`relay_based_on_MX')
This particular feature, if I understand it correctly, allows mail to be relayed
to your site if it's addressed to one of your hosts. Meaning, a spammer could
use my mail server to spam my own users, but not to relay mail to outside boxes,
which near as I can tell is what is happening.
I thought I had disabled it by adding in the "dnl" at the beginning of the line.
Either I forgot to make a new sendmail.cf file, forgot to restart sendmail, or
just adding in dnl at the beginning of the line didn't "comment" it out. I
deleted the line, remade sendmail.cf, and restarted sendmail. I'll just have to
wait and see if this fixes the problem.
Thanks,
Glen
Today, at 14:30, John Aldrich sent through the Star Gate:
>On Tue, 30 Jan 2001, you wrote:
>> I've noticed that some spammers seem to be able to send mail through my box.
>> The msgid shows a return address of my server, while the sending party's IP
>> address is from a remote box:
>>
>> Jan 29 20:01:24 glen sendmail[13323]: UAA13323: from=<>, size=21751, class=0,
>> pri=51751, nrcpts=1, msgid=<2001
>> [EMAIL PROTECTED]>, proto=SMTP, relay=[206.228.67.73]
>>
>> How do I stop this?
>>
>http://www.orbs.org/otherresources.html
>
>
>
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