The Postage
While there is some debate whether to use metered mail or stamped mail, studies have shown that metered mail and stamped mail get opened at the same rate. Metered mail is completely acceptable and almost preferred in the world of business. Stamped mail is often viewed as personal mail and is not treated with the same priority as metered mail, which looks more professional and business oriented. Be sure to always use first-class postage for your direct mail program. First-class postage ensures timely delivery and a professional look.
The Mailing
Generally speaking both Tuesday and Wednesday are the best days to have your potential customers receive your direct mail program. Both of these days are the lightest days of mail delivery by the United States Post Office. The likelihood of having your mail opened and read increases as the flow of mail decreases. Avoid having your direct mail program arrive on Monday as this is the heaviest day of mail delivery throughout the week.