[Dovecot] IMAP proxy with master user and CRAM-MD5 auth mechanism

[ML mail]

Hi Trent,

Thanks for your exhaustive explanation now it is clear. What was unclear to me was the fact that the IMAP proxy server has to take care of the 
authentication in this case of using a master user and therefore it 
needs access to the passwords (in my case stored in the mailbox table in PostgreSQL). I still have two open questions:

1) Do I really need the userdb on my IMAP proxy config as you mention in 
your mail? In my understanding the passdb should be enough (which in my 
case will use a SQL query joining the result of my proxy and mailbox 
tables). 


2) 
Is this correct that the IMAP backend (the mailbox server) in this case 
scenario has to use PLAIN authentication and can NOT use CRAM-MD5?

Regards,ML