EDDM & Residential Saturation Mailing are very similar types of mailing methods because they both will deliver a direct mail piece to each address on a carrier route. They are at a discounted rate compared to regular direct mail postage.   EDDM (Every Door Direct Mail) mailers are sent without names or addresses.  They are simply addressed as “Local Postal Customer”.  The postal couriers in a region are given bundles of these mailers for distribution.   On the other hand, Residential Saturation Mailers will contain a name and an address for each address (about 70% of all addresses have a name). The cost is slightly higher on Residential Mailer, but having a name and address on the mailer often produces better response rates than EDDM mailer.  A Residential Saturation Mailer includes information on the average demographics of each household, including the average age, income, number of children, and more.