Access a Gmail IMAP Account via Evolution
To access Gmail via IMAP you must turn on IMAP in your Google account. See the Gmail Help for more information.
It is recommended to set up Gmail as an online account in GNOME. Please refer to the GNOME Desktop Help for more information. After doing so, the Gmail account will be listed in Evolution.
For configuring the account in Evolution, refer to the IMAP+ mail account settings. Note that not all options of such accounts can be edited in Evolution and such accounts can only be removed in Online accounts itself.
As an alternative to setting up an online account in GNOME, allow access for less secure apps in your Gmail account settings.
For performance reasons it is recommended to Use a Real Folder for Trash by setting it to [GMail]/Trash and to Use a Real Folder for Junk by setting it to [GMail]/Spam under the account's Defaults.