As Sendgrid's documentation makes clear, their web GUI activity page is only searchable for the past 7 days.
How do I search for activity from farther in the past?
Web API documentation is here, but I can't find anything about just plain searching for info on sent emails. All I see are endpoints for seeing particular categories of emails' various fates, like blocks, bounces, invalid emails, and "filters", which seem like actions and not like filters.
It's got to be possible to just find info about some particular sent email, right?