I have 22,000 emails! How can I delete all of them at once? And will it lock up my computer?
MacBook
Delete multiple messages. In the message list, select one or more messages or conversations, then click the Delete button in the Mail toolbar or press the Delete key. Search for a set of messages to delete. Delete a mailbox, which deletes all the messages it contains.
https://support.apple.com/guide/mail/delete-messages-mlhlp1001/mac from that website
You can select multiples of individual emails with the command-key, but if you attempt to whack them all at once, be prepared for the spinning beach ball. Set an achievable, daily goal to remove a block of messages (e.g. 1000 messages per day). That example would be 20 repetitions of 50 messages. You decide how many you can remove at a time before Mail goes off into the weeds.
You may want to use Mail filters to automatically trash spam, and personal discipline to daily clean up non-essential emails. That way, you won't have to go through this again.
I have 22,000 emails!
