like others, i have lost email due to apple's carelessness in pre-de-bugging its macOS Mail app.
but yesterday i took a chance on seeing if macOS 10.15.3 was stable enough, and did a sequence of applying some of my Mail rules that moves mail to various local folders on my mac.
in all cases, mail was not lost after i applied these mail rules.
from 10.15 through 10.15.2 mail could be predictably "lost" when i applied these same rules.
this time, in 10.15.3, although mail was not lost, it took a really long time for the mail to eventually show up in the anticipated folder.
like so much time that i actually closed mail (after about 3 minutes) after the mail didn't appear (except for the header info) .
but the next time i opened mail the mail was there. and its several attachments were also there.
i can't imagine anything that would take local device processing time to the extent that requires already downloaded mail to be simply moved to different folders taking over 3 minutes.
so there is definitely still weirdness going on.
but its managing through the process better than the earlier versions, and capable of not losing mail.
im optimistic.
but yesterday i took a chance on seeing if macOS 10.15.3 was stable enough, and did a sequence of applying some of my Mail rules that moves mail to various local folders on my mac.
in all cases, mail was not lost after i applied these mail rules.
from 10.15 through 10.15.2 mail could be predictably "lost" when i applied these same rules.
this time, in 10.15.3, although mail was not lost, it took a really long time for the mail to eventually show up in the anticipated folder.
like so much time that i actually closed mail (after about 3 minutes) after the mail didn't appear (except for the header info) .
but the next time i opened mail the mail was there. and its several attachments were also there.
i can't imagine anything that would take local device processing time to the extent that requires already downloaded mail to be simply moved to different folders taking over 3 minutes.
so there is definitely still weirdness going on.
but its managing through the process better than the earlier versions, and capable of not losing mail.
im optimistic.