An electrical connector assembly includes an insulative housing (10) having a forward mating port (100) in a suspension manner, a plurality of recesses (112), arranged in a matrix manner, formed in the housing (10) under the mating port (100) so as to form a plurality of corresponding partitions (111) among the recesses (112) for support of the mating port (10). The matrix array of recesses (112) is arranged to strengthen the rigid of the housing (10) under the mating port (100) so as to prevent the deformation of the mating port (100), which is influenced from the insert force under a condition when the electrical connector mates with a complementary connector.