Antitoxin component of a type II toxin-antitoxin (TA) system. Neutralizes the toxic effect of zeta toxin. Part of a postsegregational killing (PSK) system involved in the killing of plasmid-free cells. Continuous synthesis of the epsilon antitoxin is required to counteract the zeta toxin (By similarity). In the presence of the zeta toxin, forms an inactive PezA(2)PezT(2) heterotetramer. Belongs to the epsilon antitoxin family.