I look after a Civi install which has hundreds of completed mailings. I'd like to tidy things up a bit by archiving a lot of the older mailings, but there's no way that I can see to achieve this using the user interface.
Would it be OK simply to set the is_archived field in the civicrm_mailing table to '1'? I know for a lot of stuff tinkering directly with the database isn't a good idea, but in this case?
Ideally the mailing search results pages would work in the same way as contact search results pages and have checkboxes and an action menu, but that's not evident in the version currently running here (4.7.29 I think).