On 7/18/2014 4:50 AM, Ted Lemon wrote: > I must be missing something here. You're saying you want me to set > up a null MX for all my hosts to prevent someone else's MTA having > undeliverable mail sitting in the queue for a week? Why would I > care about your MTA's queue? Why would this issue even be on my > radar? Well, some operators actually like being good neighbors, especially when the effort needed is tiny and one-time. But even if they don't care about that, they might prefer not to have those guys banging on their servers for days until the message times out. > The second example you give, stopping mail being delivered to the web > server, is actually served better by setting up a proper MX that > directs the mail to the right server. Does an HTTP server really > care about the occasional SYN to port 25? Ahhh. You haven't heard of the scaling effects of botnets. So the answer is yes, since it might not be 'occasional'. d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net -- Dave Crocker Brandenburg InternetWorking bbiw.net