Does an Exim server advertise STARTTLS by default?

[u34 at net9.cf]

Referring to /usr/share/doc/exim4-base/README.Debian.gz:
Section 2.2.2. TLS support for Exim as server, reads

   To enable use of the installed certificates set the macro
   MAIN_TLS_ENABLE in a local configuration file as described in
   Section 2.1.3, "Using Exim Macros to control the configuration".

   After this configuration, Exim will advertise STARTTLS when connected
   to on the normal SMTP ports.

I have a difficulty with the word After. In particular, After what? The 
way I understand it, the README states STARTTLS will be advertised after 
setting the macro MAIN_TLS_ENABLE. Which, I think, is wrong. My 
understading is STARTTLS is advertised without setting MAIN_TLS_ENABLEtoo. 
If this is not the case, why bother with the automatic generation of the 
self signed certificate?

--
u34