Normally translates into "for" but that isn't so vice versa. Once more, another caveat not to translate word for word. But, this is a very generalized statement, there are various forms of relays and every relay behaves in different ways as essential for its software, The most popularly employed relays https://rivermtaf06396.bloggerchest.com/26870825/smtp-relay-der-unsichtbare-motor-der-e-mail-kommunikation