Sometimes when you want to logon to RoundCube web page, an error is displayed "Unable to connect to imap server"
This reason is that the server name set in RoundCube cannot be reachable.
To fix it:
- Go to messaging section
- click on Mailbox tab on the main page.
- Select RoundCube WebMail system.
- On the new screen, search the "The mail host chosen to perform the log-in" field
- Change the value to 127.0.0.1
- Click on Edit button
