# retry times when no IPv6 connectivity need_ipv4 # server PORT_S 220 ESMTP EHLO 250-OK 250 HELP MAIL FROM: 250 Sender OK RCPT TO: 250 Recipient OK DATA 350 Send message . 250 OK QUIT 250 OK **** # This should successfully send to the IPv4 address, after failing to # connect to the IPv6 address. exim -odi userx@mx46cd.test.ex First message **** # Let the IPv6 address time out sleep 2 # server PORT_S 220 ESMTP EHLO 250-OK 250 HELP MAIL FROM: 250 Sender OK RCPT TO: 250 Recipient OK DATA 350 Send message . 250 OK QUIT 250 OK **** # This should also be successful exim -odi userx@mx46cd.test.ex Second message **** # dump retry # The IPv6 address has timed out, but the IPv4 address should still be OK exim -odi userx@mx46cd.test.ex Third message **** dump retry exim -q **** exim -q **** exim -q **** exim -q **** exim -q **** no_msglog_check