The usage of html emails to communicate coupons and special offers is perhaps one of the most obvious and fundamental goals behind newsletters in general. In fact, it is quite often the potential to receive special offers that entice people to sign up for a newsletter in the first place. In particular I like the Dominos Dominos. The efficency of the emails is what really strikes me. Often vendors get tempted to mash all they can into an email. Instead, the Dominos ones are simple and place the offer prominently in the email. Several others take a similar approach, like Jimmy'z Brand , Coldwater Creek and Ann Taylor.