if ( !smtp_get_interface(tf->interface, host_af, addr, &interface,
US"callout")
|| !smtp_get_port(tf->port, addr, &port, US"callout")
if ( !smtp_get_interface(tf->interface, host_af, addr, &interface,
US"callout")
|| !smtp_get_port(tf->port, addr, &port, US"callout")