On Mon, Mar 24, 2003 at 10:29:36AM -0500, Trei, Peter wrote: > If the mail server introduces an increasing delay (similar > to the backoff mechanism in Ethernet) to it's response after the > first 2 RCPTs, the server becomes useless for sending spam. > Similarly, it could slow it's response if the rate of commands > which start a new message (HELO MAIL SEND SOML SAML) > from a given IP rises above a threshold.
How would this work with legit mailing list servers making a delivery attempt? From what I understand, when I send something to Politech, postfix will try to connect to aol.com and deliver over a thousand messages in quick succession. That's more efficient than a thousand connections with one message each. -Declan
