Tip of the Day: To avoid having one of your precious invites open en route, reinforce the closure method on your envelopes by using glue or some other super strong adhesive. Licking is not only hard on your mouth (the taste! paper cuts!), it also doesn't guarantee the package will arrive in one piece. For a pretty touch, add a sticker or piece of washi tape, but don't rely on these things as the main closure method. They can fall off or catch on other items during delivery.
Plus, check out more Things You Need to Know About Mailing Your Wedding Invitations.