> I'm saying that one source system can generate more than 64K > IMAP4 sessions. These are systems running various sorts of > proxies, so they are in effect hosting many clients at once. True, but if we are running IPv6 then surely the solution to this problem would be to simply request some number of additional IP address allocations via DHCP? This is already done in the IPv4 world, it can be done in the IPv6 world. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf