4 ms·
it's been standardized by the IETF recently: https://jmap.io/ https://jmap.io/ and there's a couple of client & server implementations https://jmap.io/software
by mfashby 4y ago
it's been standardized by the IETF recently: https://jmap.io/ https://jmap.io/
and there's a couple of client & server implementations https://jmap.io/software.html https://jmap.io/software.html
but it's a long long way from popular yet AFAICT from the lack of support from the big hosted mail providers other than fastmail.