>Does anyone
>have suggestions for setting the security options regarding spamming and
>spoofing to provide maximum security to the server without tying myself
>in knots?

1. smtp security: relay for addresses and put in your ip subnets

2. Disable SMTP AUTH reporting: leave unchecked
and require all users to use SMTP AUTH in the mail programs

3. block ip spoofing at you border router

Len

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