Fred Baker <fred@xxxxxxxxx> writes: > That is the ISP's choice. As a percentage of total volume, > SMTP/ESMTP is a small proportion of total traffic, or so please I > can read sample measurements (like > http://www.caida.org/dynamic/analysis/workload/sdnap/0_0_/ts_top_n_app_bytes.html) > would lead me to believe. I can confirm this for a different network. Email (which includes [E]SMTP, POP, IMAP, versions of these over TLS, and such) comprises about 0.5% of the traffic on Abilene. For comparison, HTTP is about 15%. (The ratio is almost exactly the same as in the plot Fred cites.) Even during weeks when there is an unusually large amount of SMTP traffic because of email worms, we're still talking about 2% of traffic being mail. http://netflow.internet2.edu/weekly/ -- Stanislav Shalunov http://www.internet2.edu/~shalunov/ This message is designed to be viewed at an angle of 45 degrees. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf