Direct marketing envelope mailers are mailers in which the marketing material is stuffed inside an envelope. Envelope stuffing allows the marketer to include more than one insert. When more than one direct mail advertising party goes in on an envelope mailer, it is referred to as "marriage mail." Valpak is an example of a marriage direct mail service.
Envelope printing is a popular form of direct mail--if effective, direct mail printing, business envelopes, company envelopes and consumer coupon envelopes lure the reader to open and check out the contents.
Door hanger envelopes are another means of direct mail marketing that hook the reader by its appearance and consequently invite the reader to look at the contents.