Len, >> That's better than nothing, but much better is to reject unknown users at the MX, rather than wait for bounces from the mailbox server.
In either case, you then harvest the postfix unknown user reject lines for the PTR-less IPs that send over a threshold. >> Makes sense how do I do this. OK can you please tell me Andrew P. Kaplan www.cshore.com "I went into the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived." Henry David Thoreau
