Email stuck too large attachment
By accident I attached an entire photo library to an email. Getting message "This message can't be saved to Drafts mailbox.This message contains one or more attachments that are too large to be saved to the drafts mailbox. Try deleting some attachments" There is an OK to click. I click it but the same message just repeats. I can't get it to go away so I can access the email and delete attachments. Can't quit mail because of it. I'm stuck! Thanks in advance for any help.
MacBook Pro 13″, macOS 12.6