[BlueOnyx:00526] Re: Spam Problem

[Lucas Peyatt - Ohio Web Hosting & Development]

As far as I know there is nothing you can do to stop this, I posted on the 
nuonce support forum about this a while back,

http://www.nuonce.net/support/viewthread.php?tid=2163

Do you have SpamAssassin installed on your server(s)?

What I have done since then is add my email address to the SA blacklist. Since 
then I wrote a custom SA rule to give mail from myself a 2-4 point score, this 
in tandem with the other rules blocks most of it. I also gave a higher score to 
mail servers with no reverse DNS.

Here is some more info on this issue,
http://ask-leo.com/why_am_i_getting_spam_from_myself.html

On Mon, 16 Feb 2009 10:27:07 -0700, Rodrigo Ordonez Licona wrote
> Hi, We are having trouble with some spammers ,
> 
> Emails are getting through even though we have disabled 
> popauthenticated service.
> 
> We have a Blueonyx Fully yummed , If you send an email from a valid address
> to that valid address the messages is accepted.
> 
> Does anyone know how can we stop this kind of spam:
> 
> ==========================================
> 
> telnet ip.add.re.ss 25
> ehlo server
> mail from:validuser at mydomain.com
> 250 2.1.0 validuser at mydomain.com... Sender ok
> Rcpt to:validuser at mydomain.com
> 250 2.1.0 validuser at mydomain.com... Sender ok
> Data
> 354 Enter mail, end with "." on a line by itself
> 
> Put spam here
> 
> .
> 250 2.0.0 n1GHbxs2003114 Message accepted for delivery
> 
> ===========================================
> 
> Same happens with out Bluequartz and strongbolt.
> 
> Is it safe to change something at
> Sendmail.cf at this line ?
> O DaemonPortOptions=Port=smtp, Name=MTA
> 
> Something like 
> O DaemonPortOptions=Port=smtp, Name=MTA, M=Ea
> 
> Regards
> 
> Rodrigo O
> Xnet
> 
> P.S. My apologies Gerald
> 
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> Blueonyx at blueonyx.it
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--
Lucas Peyatt
Ohio Web Hosting & Development
lucas at ohiowebhosting.net
www.ohiowebhosting.net
937.969.4476 dayton
614.441.8169 columbus
513.258.2376 cincinnati
206.350.1292 facsimile