mta_host_to_text
mta_host_to_text(mx->host));
mta_host_to_text(mx->host));
mta_host_to_text(mx->host),
mta_host_to_text(r->dst));
mta_host_to_text(s->route->dst));
(void)snprintf(relay, sizeof relay, "%s", mta_host_to_text(s->route->dst));
const char *mta_host_to_text(struct mta_host *);