MailQuestionMark icon from Vadivam, a 24px outline icon set. Tags: email, message, letter, unread, help, guide, tutorial, manual, unknown, unidentified, unspecified, uncertain, undetermined, missing, to be determined, mystery, question, question mark, ?, delivery, undelivered.
pnpm dlx shadcn@latest add "https://vadivam.praveenjuge.com/r/mail-question-mark.json"