[SATLUG] Setting up email server

[Brad Knowles]

On 9/10/07, Richard Maynard wrote:

>  Outbound mail can be a bit more tricky because of all the anti-spam
>  measures out there. If your forward and reverse records match, you
>  won't have a problem there.

Of course, that's just one of the hundreds of things on the list of 
anti-spam things to be checked.

>         However with outbound mail there could be more factors to
>  consider, if you want something like DomainKeys implemented to help
>  your server not be seen as a source of spam, you would likely need
>  your own DNS server.

DKIM won't help there.  In fact, DKIM won't actually help solve any 
part of the spam problem.

In theory, it helps to prove that mail was legitimately sent by the 
person/system that claims to have sent it, but the problem is that 
calculating all those crypto signatures is one of the most expensive 
things you could ever ask a computer to do (which is why encryption 
is so useful), and all the spammers need to do is to generate a few 
million mail messages with fake DKIM signatures and that will bring 
the entire system down.

-- 
Brad Knowles <brad at shub-internet.org>
LinkedIn Profile: <http://tinyurl.com/y8kpxu>