Just how static is that IP address?

[Brian Chabot]

Ted Roche wrote:

> Here are my questions: how do the big email services distinguish 
> dynamic from static IPs? Is there a great big list somewhere listing 
> the 256^4-2 addresses? Is there a way I can determine if the address 
> I get is "really" static (if there is such a thing) or should I just 
> try to set up a email server and see if I can get through to 
> dad at aol.com?


Here's the all-in-one answer:  They use one or more of several
blacklists like these:

http://njabl.org/dynablock.html
http://www.mail-abuse.com/enduserinfo_dul.html
http://rbl.kropka.net/info.php?lang=en

You can look up an IP on a LOT of blacklists at
http://www.dnsstuff.com/tools/ip4r.ch?ip=

Brian