I have a new ZCS 8.0.6 server up and running smoothly so far. I'd like to look into DNSBL/RBL as another layer to prevent Spam.
Setup in 8.0.6 under Global Settings -> MTA seems easy enough.
What are the rest of you checking under the three options?:
Client IP address
Hostname in Greeting
Also, what are some reliable DNSBL/RBL that are available for free or commercial use? I've used spamhaus and spamcop before with success years ago. Just wondering what others are using.
Thanks for any tips or advice you can provide.