Create a new folder for those emails. * Right click on mail account name in left Folder Pane. * select 'New Folder' * Give folder a suitable name eg: 'Facebook' * create as subfolder of: mail account name * click on 'Create Folder' If this is an imap mail account then you may need to Subscribe to see the folder. then create a filter to send emails automatically to that folder. * 'Menu icon' > 'Message Filters' > 'Message Filters' * Make sure you creating a filter for the correct mail account * click on 'New' * Give filter a suitable name eg: Facebook Apply filter when: * select 'Manually Run' * select 'Getting new mail' * select ' Filter before Junk Classification' * select 'Match all of the following' * select 'From' and 'Contains' and type: facebook Perform these actions: * select 'Move message to' * choose the 'Facebook' folder on mail account name. * click on 'OK' Make sure the new filter called 'Facebook' is enabled. click on 'Filter log' button select checkbox 'Enable the filter log' click on 'Close' If you have emails in eg: Inbox from facebook people, you could manually run that filter on the Inbox. * select / highlight the 'Facebook' filter Run selected filter(s) on: * click on 'Choose Folder' drop down options * select the Inbox on that mail account. * click on 'Run Now' button. See more info on this topic here: * https://support.mozilla.org/en-US/kb/organize-your-messages-using-filters