Hi Stan,
Last time, I let those configuration as default:
$rcmail_config['imap_auth_type'] = null; $rcmail_config['imap_root'] = null; $rcmail_config['imap_delimiter'] = null;
Now, my one is:
$rcmail_config['imap_auth_type'] = "plain"; $rcmail_config['imap_root'] = null; $rcmail_config['imap_delimiter'] = "."; //a dot for delimiter
Actually, in MYSQL database, the Password is MD5-CRYPT. I just checked it again, the password was store like "$1$51dd62a1$RxZRpwoZ/q5EuEH/3epFp". But I don't know why I setup the PLAIN and it's still working. This is my experience when I configure for ManageSieve Plugin (of RoundCube). I also set Plain for ManageSieve and it works.
I store all mails in the directory of each user, so this parameter is blank.
I'm using Dovecot and the Default folder Delimiter is a dot "."
In my opinion, the first one, "imap_auth_type", is the most important parameter to speed up when you are login, and when you're click on other folders in the interface. I changed it once and the effect was very good. It was true in my case. For the second and the third, I see no effect but I still want to change it.
BRs/ Hoan.
List info: http://lists.roundcube.net/users/ BT/9b404e9e