関連ワード:  how to add a shared mailbox in gmail    how to create a shared mailbox in gmail    how to open a shared mailbox in gmail    how to add shared mailbox in gmail app    how to add a shared mailbox in google    how to create a shared folder in gmail    how to create a shared email in gmail    how to create a shared mailbox in google workspace    how to add additional mailbox in gmail    how to add a shared folder in google drive