Jesper Dybdal: > What I do not understand, postfix-wise, is that I have seen no warnings > about "using backwards-compatible" default value of smtputf8_enable > during the period where I was using compatibility_level=0.?
With compatibility_level=0, Postfix always accepts mail with a non-ascii header or address localpart. Whereas compatibility is easy to check for features that are implemented in one place, smtputf8 affects a lot of programs. One would have to enable it under the covers, but not enforce it. Wietse