What's this 'Antispam UOL'

[Paul Howarth]

On Wed, 2006-03-08 at 09:22 +0530, Parameshwara Bhat wrote:
> Dear List,
> 
> Nowadays I regularly recive replies to my postings from 'AntiSpam UOL  
> <petsupermarket.sspam at uol.com.br>'.Though there appears to be discussions  
> on this on the list,having not followed from the beginning,I could not  
> make any sense of it.
> 
> If the full header is listed,message seems to go from one shadow5 to  
> uol.com.br whose antispam returns the message.Produced below.
> 
> 	Received: 	from shadow5 (unknown [172.26.5.186]) by sauron6.uol.com.br  
> (Postfix) with ESMTP id BECC26C2261 for <peebhat at gmail.com>; Tue, 7 Mar  
> 2006 04:46:39 -0300 (BRT)
> 
> Who is this shadow5 (172.26.5.185)?

Since 172.26.5.185 is an RFC1918 private network address, it's almost
certain that "shadow5" is part of UOL's mail system.

> How my message went to this server?  
>  From gmail SMTP or fedora-list server? or from my ISP on the way?

You->Your ISP->Fedora-List-Server->Annoying fedora-list subscriber->UOL.

Paul.