# fallback_hosts after main hosts have timed out need_ipv4 # server PORT_S 220 server ready EHLO 250 OK MAIL 250 OK RCPT 250 OK DATA 354 OK . 250 OK QUIT 221 OK **** exim -odi userx@test.ex Short message **** sleep 2 server PORT_S 220 server ready EHLO 250 OK MAIL 250 OK RCPT 250 OK DATA 354 OK . 250 OK QUIT 221 OK **** exim -odi userx@test.ex Short message **** sleep 1 server PORT_S 220 server ready EHLO 250 OK MAIL 250 OK RCPT 250 OK DATA 354 OK . 250 OK QUIT 221 OK **** exim -DRETRY1=5s -odi userx@test.ex Short message **** exim -DFALLBACK= -odi userx@test.ex Short message **** exim -DFALLBACK= -DROUTE_DATA=V4NET.0.0.2 -odi userx@test.ex Short message **** sleep 3 exim -DFALLBACK= -DROUTE_DATA=V4NET.0.0.2 -DRETRY2=5s -q **** exim -DFALLBACK= -DROUTE_DATA=V4NET.0.0.2 -odi userx@test.ex Short message **** no_msglog_check