mail-warning from coolicons in Line with regular corners. email, envelope, message, alert, error, delivery. Other styles and corners: @coolicons/<style>/<radius>/mail-warning with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/mail-warning, and use @coolicons/mail-warning for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/mail-warning.json"