[CentOS] postfix tightening

Sat Apr 2 05:11:03 UTC 2005
Ryan <ryanag at zoominternet.net>

>My point is that relying on this only makes you more likely to drop
>legit mail and poses no problem to the spammers.

I don't disagree with your points that:
1. It is a bad solution to rely soley upon.
2. If a spammer chooses to, it is fairly easy to bypass (although your example 
of buying a domain name poses some risk to a guy using trojaned boxes to send 
3. If everyone did reverse DNS checks there would still be spam.

I think of it like this....

At home I block ads using the hosts file. Have been doing it since forever. I 
use the hosts file below + my own additions): 

If ad banner farms would not push obvious names, and instead use extensions of 
the legitimate sites ( www.realfoosite.com/sleazeballad ), my way of blocking 
them fails. On top of that, I also accidentally block some legitimate sites 
once in awhile.

All that being said, I don't get pop-ups, pop-unders, or ads, and this 
easy-to-defeat method of blocking ads works very well, so long as I am 
willing to accept that I am occasionally blocking some things I wish I 
hadn't. ;-)