It seems very simple, but I didn't find anything just like that.Roundcube, for instance, seems a good choice, but installing it onDebian forces me to configure a database for the users, which I reallydon't need and don't even want to use. Squirrelmail is another goodchoice, I thought it was a typical PHP application that you just dropin /var/www/html, making just some changes on some config.php, but it'snot exactly like that.Any hint would be really appreciated!I just recommended RainLoop, but I have to withdraw that: theconsensus on their GitHub issues is that the fork SnappyMail isbetter maintained.
That said, Rainloop has worked very well for me over the years,and I suspect that SnappyMail will continue that.-dsr-