> How do I do a domain lookup before accepting mail? In general all those types of features are documented here:
http://www.postfix.com/uce.html I can't tell you which one you want because I am not sure what you mean by a "domain lookup" Right hand side of the "to" or "from"? Client name in the HELO? Client IP to Name resolution? So on and so forth. Try reading over the UCE page, and then if you have a more specific question you will be on the same ground as the rest of us. --Eric
