Removing labels on Gmail with IMAP is easily, in the setting section, goo.gl/UwSRYx choose the label and click delete option.
yes
You cannot send SMS through Gmail Mobile. There are other ways to show a notification. It is the hangouts that can be used for that.
To delete a label:Sign in to Gmail.Click Edit labels at the bottom of the Labelsbox.Click remove label next to the label you want to delete.Confirm that you'd like to remove the label by clicking OK.I have done exactly that. But, the label reappeared the next time I launched gmail. The frustrating thing is, gmail also deletes the mails from the server although I have never given that instruction !
You can know the changed password on Gmail. There is a notification that the password has changed. However you cannot see the changed password.
You gmail does not give a notification about rejection. It means that either the person has not read it. Or it could be that the person rejected it.
You can delete an email from Gmail easily. The trash icon of the trash can icon is the delete sign. You can mark multiple mails by marking them.
A label once deleted can be created again. The mails inside it can be found in trash. They can be recovered to be in the new label.
Yes you can make sub-folders within a Label. A label is a folder which can be used for categorization. You can create a label within a label in settings.
u press crate a new label (just press more and u will se create new label)
There is a notification dropdown (pulling it down from the status bar) where you can see the latest Gmail messages without having to open Gmail separately. In the dropdown, you can read the body of the message, and can either reply, archive, or clear it off the dropdown.
It depends upon your browser but there is an extension for Firefox called 'GMail Notifier' when downloaded and installed it allows the addition of a short sound file from your computer