[Dovecot] 143 STARTTLS/ 993 SSL/TLS query

[Voytek Eymont]

I'm testing my new dovecot server with Thundirbird

I can have it working on
port 143 with STARTTLS, or on
port 993 with SSL/TLS

my uderstanding is that on 993 I get encrypted 'password and mail transfer'
(yes ?)

so what happens if I use 143 with STARTTLS, is that equivalent to port 993
if STARTTLS is used ?

thanks for any insights..

-- 
Voytek