hi, under ubuntu 18.04 I've used this new installer https://git.ispconfig.org/ispconfig/ispconfig-autoinstaller all work fine except roundcube, I can send mail but I can't receive them, I've got this error text Does anyone have any idea what the problem is? Thank you ps: I deleted my mail
The log does not even show a connect attempt from yahoo, so it might be that yahoo tried to deliver the email to a different server. Check your dns records to ensure that the MX record of your domain really points to the hostname of your new server and that the hostname of the server exists as DNS A-Record which points to the IP address of the server.