#Turn on IMAP Authentication
Auth_IMAP_Enabled on

#Give a name to the authentication domain, whatever you want:
AuthName "something.com"

#Only basic authentication is supported for now:
AuthType Basic

#If you feel like it, restrict the users or allow all valid users:
Require valid-user

#Make IMAP Authentication authoritative for this .htaccess file:
Auth_IMAP_Authoritative on

#Set the IMAP Server to which you want to connect (default=localhost):
Auth_IMAP_Server imap.something.com

#Set the port on which the imap server is running (default=143):
Auth_IMAP_Port 143

#Turn on some extra logging (login attempts, etc.) in Apache's Error Log
Auth_IMAP_Log on