Re: Slightly OT: mail from this list really piling up. Any strategies?
And from the Gmail side, see this page for all the Gmail search operators: https://support.google.com/mail/answer/7190?hl=en
Then specifically have a look at the before/after/older/newer operators. Search the table for Search for messages sent during a certain time period and you're where you need to be.
Then see my tutorial, which doesn't use those specific operators, but covers how to do mass selection in general when more messages are returned by a search than can be selected on a single page of displayed results: Mass Selection and Deletion of Gmail Messages via the Gmail Web Interface
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
The depths of denial one can be pushed to by outside forces of disapproval can make you not even recognize yourself to yourself.
~ Brian Vogel