Can the disable_plaintext_auth setting get overridden for a specific port?

In 10-auth.conf, I have "disable_plaintext_auth = yes"

For port 143, I'd like to do something like this to override that setting:

service imap-login { inet_listener imap { port = 143 disable_plain_text_auth = no } }

Based on https://wiki.dovecot.org/LoginProcess and https://doc.dovecot.org/configuration_manual/service_configuration/ it doesn't seem like this is supported. But maybe there is another way to accomplish this?