[Dovecot] Understanding Sockets

[Tim Smith]

Hi,

Just trying to consolidate my knowledge of Dovecot and I want to 
understand various things rather than just key out lines of config in 
dovecot.conf with the hope of it working.

What I wanted to clarify is my understanding the "socket listen" section 
of the config file. From my limited understanding, this section details 
how other processes can access the userdb defined in Dovecot. The master 
socket is used for "internal" processes which is mainly dovecot-lda so 
that when Dovecot receives mail it knows where to deliver it and client 
is defined for "external" processes, for example Postfix who would use 
the info to determine if a user existed. Would you say this is a fair 
(albeit) dumbed down!!) synopsis of sockets and their purpose?

Thanks in advance!

Tim