Failed to connect to server. Make sure you have entered the data correctly.

I get this error when logging in to Roundcube. But the information is correct, I have 3 domains on the server, the login works perfectly on 1 of the domains, and 2 does not work by reporting the error above.

Has anyone had a similar problem? Aah, that same E-mail also does not connect in Gmail, but the domain that works, connects perfectly, all the settings are identical for all accounts with the same package and adjustments, there is nothing wrong.

I discovered that when creating E-mail in centos, it does not create the files in the var/vmail directory

this directory is auto-created on login to your mailbox.