+### non-prox plain receive
Connecting to 127.0.0.1 port 1225 ... connected
??? 220
<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
??? 221
<<< 221 myhost.test.ex closing connection
End of script
+### protocol v1 plain receive
Connecting to ip4.ip4.ip4.ip4 port 1225 ... connected
>>> PROXY TCP4 127.0.0.2 127.42.42.42 64000 25
??? 220
??? 221
<<< 221 myhost.test.ex closing connection
End of script
+### protocol v2 plain receive
Connecting to ip4.ip4.ip4.ip4 port 1225 ... connected
>>> \x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A\x21\x11\x00\x0c\x7f\x00\x00\x02\x7f\x2a\x2a\x2a\xc2\x95\x04\x01
??? 220
??? 221
<<< 221 myhost.test.ex closing connection
End of script
+### proxy timeout
+Connecting to ip4.ip4.ip4.ip4 port 1225 ... connected
+??? 220
+<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+>>> PROXY TCP4 127.0.0.2 127.42.42.42 64000 25
+??? 503
+<<< 503 Command refused, required Proxy negotiation failed
+>>> QUIT
+??? 221
+<<< 221 myhost.test.ex closing connection
+End of script
+
+******** SERVER ********
+### non-prox plain receive
+### protocol v1 plain receive
+### protocol v2 plain receive
+### proxy timeout