I can reproduce with Thunderbird 78.8.0 on Debian.
IMAP, IMAPS, SMTPS connections go via the configured SOCKS5 proxy, but LDAPS connections are not proxied.
I can reproduce with Thunderbird 78.8.0 on Debian.
IMAP, IMAPS, SMTPS connections go via the configured SOCKS5 proxy, but LDAPS connections are not proxied.