If anyone can point me in a direction or to a mailing list on topic, I 
would greatly appreciate it.

I'm trying to breath life into my web work again, and this week discoverd 
that my little mail server IP (I'm running Post.office) was added to a 
"SpamWatch" list (ORDB.org) and I immediately got a call from a client that 
their email was rejected from a foriegn host because that host uses the 
ORDB service.

After two hours of trying to understand email relaying, I had no choice at 
the moment to stop ALL relaying to get off that server.  This however is 
completely unrealistic from how I understand relaying to work for clients...

Let's say I've got a client in California, who has a return address of one 
of my local accounts, but hey, they're not sending email from inside my 
network, so I originally said only allow relaying for mail with local 
domain names in the FROM field...

With spammers spoofing good FROM fields these days, ORDB says - no go.... 
so then I think my only choice is to allow specific IP's... but how am I 
supposed to know what IP a client is using if they're on a dial up account, 
say through AOL or PacBell, or some little host in Iowa that forces dynamic 
changing IPs with each log-on?

Their IP changes.  Surely I can't let ALL AOL IPs through or ALL PacBell 
IPs through... there's got to be spammers on one or both of those right?

So how do I deal with this?  What is the correct configuration?

Just as a side note - last year, before I even understood about relaying at 
ALL, I had allowed ALL mail through, and of course, my server flooded one 
day to the point of shutdown because some spammer found my server as an 
open invitation!  SO I truly need and want to do what's right here... hey - 
I already get over 500 spam emails a day filtering through my local 
workstation ya know?

Rafael

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