# SMTP still alive check before final response need_ipv4 # exim -DSERVER=server -bd -oX PORT_D **** client -t5 127.0.0.1 PORT_D ??? 220 ehlo abcd ??? 250- ??? 250- ??? 250- ??? 250 mail from:\r\nrcpt to:\r\ndata ??? 250 ??? 250 ??? 354 This is a test message. . +++ 1 **** sleep 1 killdaemon