Can the disable_plaintext_auth setting get overridden for a specific port?

[Steve Dondley]

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?