[CentOS] Re: Planning Mail Server (with low resources)

[Rodrigo Barbosa]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Tue, Dec 06, 2005 at 10:36:12AM -0500, Scot L. Harris wrote:
> > > That depends on how you see it. If you are thinking about the spam ratio,
> > > yes, you are correct. RBLs can filter up to 90% of all the spam (in my
> > > experience). On the other hand, if you are being targeted by 1000's of
> > > spams daily, you will still get a fair number of them.
> > 
> > More than 90% is possible in mine :) and it is also a case of being 
> > targeted...
> > 
> > Content filtering for spam is one of the worst things to do.
> > 
> 
> That is why I like greylisting.  Very little resources required and in
> my experience it blocks 98% or better of the spam I see.  Prior to that
> there would be days when a spam storm would hit and backup email for
> several hours.  Spamassassin did a good job of sorting it out but it
> took all of the systems resources to handle it.
> 
> And with greylisting you are not dependent on someone else's RBL lists
> or connectivity to a system somewhere on the Internet.  Once setup it
> has required little if any additional admin work to keep it running.  It
> actually allowed me to pretty much get out of the business of fighting
> spam which had started to consume a large amount of my time.
> 
> And with the combination of greylisting and spamassassin it is rare that
> any spam gets through to an end user.  

There are many definitions of graylisting. But since the "click here
to validate your e-mail" is the most common on the mind of the
people I have contact with, I'll assume that is the (main) one you
are reffering to. Please correct me if I'm wrong.

When I send e-mail and I get back a message like that, 90% of
the time I'll simply ignore it. The other 10% is when there is
some money for me relatated to the e-mail I'm sending.

A secondary problem is that practice will for users to click on
links on e-mails, which is not something I want my users doing without
thinking about. Good habits are to be cultivated, and bad habits
are to be avoided at all costs (says the guy who smokes 2 packs a
day :)).

[]s

- -- 
Rodrigo Barbosa <rodrigob at suespammers.org>
"Quid quid Latine dictum sit, altum viditur"
"Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFDlbNVpdyWzQ5b5ckRAncHAKCmldEFclsfnsfmj/72D3XM5cCPrACeNP8C
+K5Xek8RY8h34CpHxeBU9Pg=
=nE0v
-----END PGP SIGNATURE-----