Help to setup a Unix socket based authentication server for dovecot in Python

[Sherin A]

Hi,

  I am  building a custom server platform in which dovecot is used for 
imap/pop . But the default authentication mechanism is not suitable for 
me becuase each domain will have different system users and different 
location for mail storage . So I need to create a custom authentication 
mechanism using python .  There is an option to use Key-value 
authentication (dict) database via socket  as per

https://doc.dovecot.org/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket


The above documentation link have  a sample perl script too  to send 
authentication to

uri = proxy:/var/run/auth_proxy_dovecot/socket:somewhere

So my question is how the inputs are send to the socket file ? in which 
format ?

How the result return ? and in which format ?

Let us say I can create a python socket program that can listen to 
/var/run/auth_proxy_dovecot/socket for getting the inputs from dovecot 
,  but what is the format

Is it like the following

AUTH PLAIN

USER test at myemail.com

PASS  mypassword


I  looked into the documentation and developer documentation, I am 
unable to see how   dovecot send the data ,  I can see  a sample perl 
for answering dict lookups.  Any one have a python alternative for it. ?



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