>> Getting rid of the AAAA fallback flips the default to be in line with >> reality > >Flipping any 20-year default for an global installed base should be >pursued with an assumption that it won't work, not that it will.
Sure, but what's the installed base? There's a presumably large set of hosts accepting mail via A records. There's no hosts accepting mail via AAAA records. Nobody's suggesting that we get rid of default to A. That would have had to happen in 1988. R's, John
