The postal service tends to frown upon loose, random letters and cards that arrive in their mail. In order to protect what you’re mailing and keep your friendly neighborhood postal worker happy, you might want to drop it in an envelope. Luckily, there’s Envelope Mall, a website where you can find virtually any type of envelope. Metallic envelopes. Fluorescent envelopes. Miniature envelopes. Invitation envelopes. And a whole lot more. Get enveloped (ha…) in your mailing needs and shop Envelope Mall.