The impact panel, above the statement, shown before anything can change:
"3 accounts used a legacy mail app in the last 30 days. Their mail apps
will stop working the moment you turn this on:", then one line per
account with every protocol it used and how long ago it last did, most
recent first. With nobody, it says so in one line. While the switch is
off it isn't shown -- there is nothing left to warn about.
It reads recentLegacyUse from inbuxa:ProtocolPolicy, which the server
fills from one timestamp per account and protocol (inbuxa-server
feat/legacy-use-panel). A server without it gets no panel at all rather
than a false "nobody": null and an empty list are kept apart.
Protocols read as the table names them (IMAP, POP3, ManageSieve, SMTP
submission), and "2 days ago" comes from Intl.RelativeTimeFormat in the
reader's language.
jcoffey-dev