[SOGo] SOGo with externally hosted mail

[Matthew]

I have a client whose requirements call for hosting their email accounts 
externally.   I have searched the docs but not found mention of the 
following scenario - does SOGo support a scenario wherein users' email 
is hosted externally, and connection to those external user accounts 
made through IMAP?   To be clear, this is distinctly different than 
periodic collecting email from external accounts and transferring to 
local SOGo mailbox.   Mailbox would remain on external host, and simply 
be accessed by SOGo via IMAP.

Thank you
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