### (1) non-prox plain receive (not advertised) (2) XCLIENT refules when not advertised
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
>>> EHLO plainclient
??? 250-
<<< 250-myhost.test.ex Hello plainclient [IP_LOOPBACK_ADDR]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250 HELP
<<< 250 HELP
>>> MAIL FROM:<a@test.ex>
??? 250
<<< 250 OK
>>> RCPT TO:<b@test.ex>
??? 250
<<< 250 Accepted
>>> DATA
??? 354
<<< 354 Enter message, ending with "." on a line by itself
>>> Subject: test
>>> 
>>> body
>>> .
??? 250
<<< 250 OK id=10HmaX-0005vi-00
>>> XCLIENT NAME=proxylookedupname.net ADDR=127.0.0.2 PORT=4242
??? 550
<<< 550 XCLIENT command used when not advertised
>>> QUIT
??? 221
<<< 221 myhost.test.ex closing connection
End of script
### receive, (1) fully loaded (2) new conn (3) bad: transaction in progress (4) bad: missing EHLO after XCLIENT
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
>>> EHLO xclientproxy
??? 250-
<<< 250-myhost.test.ex Hello xclientproxy [ip4.ip4.ip4.ip4]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250-XCLIENT
<<< 250-XCLIENT ADDR NAME PORT LOGIN DESTADDR DESTPORT
??? 250 HELP
<<< 250 HELP
>>> XCLIENT NAME=proxylookedupname.net ADDR=127.0.0.2 PORT=4242 DESTADDR=10.42.42.42 DESTPORT=25 LOGIN=hisloginname
??? 220
<<< 220 XCLIENT success
>>> EHLO clienthelo
??? 250-
<<< 250-myhost.test.ex Hello proxylookedupname.net [127.0.0.2]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250-XCLIENT
<<< 250-XCLIENT ADDR NAME PORT LOGIN DESTADDR DESTPORT
??? 250 HELP
<<< 250 HELP
>>> MAIL FROM:<c@test.ex>
??? 250
<<< 250 OK
>>> RCPT TO:<d@test.ex>
??? 250
<<< 250 Accepted
>>> DATA
??? 354
<<< 354 Enter message, ending with "." on a line by itself
>>> Subject: test
>>> 
>>> body
>>> .
??? 250
<<< 250 OK id=10HmaY-0005vi-00
>>> XCLIENT NAME=[TEMPUNAVAIL] ADDR=127.0.0.3 PORT=4243 LOGIN=[UNAVAILABLE]
??? 220
<<< 220 XCLIENT success
>>> EHLO anotherhelo
??? 250-
<<< 250-myhost.test.ex Hello anotherhelo [127.0.0.3]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250-XCLIENT
<<< 250-XCLIENT ADDR NAME PORT LOGIN DESTADDR DESTPORT
??? 250 HELP
<<< 250 HELP
>>> MAIL FROM:<c2@test.ex>
??? 250
<<< 250 OK
>>> RCPT TO:<d2@test.ex>
??? 250
<<< 250 Accepted
>>> DATA
??? 354
<<< 354 Enter message, ending with "." on a line by itself
>>> Subject: test
>>> 
>>> body
>>> .
??? 250
<<< 250 OK id=10HmaZ-0005vi-00
>>> MAIL FROM:<c2@test.ex>
??? 250
<<< 250 OK
>>> XCLIENT NAME=bad.time.for.xclient
??? 503
<<< 503 mail transaction in progress
>>> RSET
??? 250
<<< 250 Reset OK
>>> XCLIENT NAME=miss.ehlo.after.xclient
??? 220
<<< 220 XCLIENT success
>>> MAIL FROM:<bad@test.ex>
??? 503
<<< 503 HELO or EHLO required
>>> QUIT
??? 221
<<< 221 myhost.test.ex closing connection
End of script
###          (5) no operands to XCLIENT (6,7) unrecognised operands
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
>>> EHLO xclientproxy
??? 250-
<<< 250-myhost.test.ex Hello xclientproxy [ip4.ip4.ip4.ip4]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250-XCLIENT
<<< 250-XCLIENT ADDR NAME PORT LOGIN DESTADDR DESTPORT
??? 250 HELP
<<< 250 HELP
>>> XCLIENT
??? 501
<<< 501 XCLIENT must have at least one operand
>>> XCLIENT NONO=
??? 501
<<< 501 XCLIENT: unrecognised parameter 'NONO'
>>> XCLIENT NAMEfoobar=
??? 501
<<< 501 XCLIENT: unrecognised parameter 'NAMEfoobar'
>>> XCLIENT SIXSIX=
??? 501-
<<< 501-XCLIENT: unrecognised parameter 'SIXSIX'
??? 501 Too many
<<< 501 Too many syntax or protocol errors
???*
Expected EOF read
End of script
###          (7) operand with zero-len value (8) operand with no value
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
>>> EHLO xclientproxy
??? 250-
<<< 250-myhost.test.ex Hello xclientproxy [ip4.ip4.ip4.ip4]
??? 250-SIZE
<<< 250-SIZE 52428800
??? 250-8BITMIME
<<< 250-8BITMIME
??? 250-PIPELINING
<<< 250-PIPELINING
??? 250-XCLIENT
<<< 250-XCLIENT ADDR NAME PORT LOGIN DESTADDR DESTPORT
??? 250 HELP
<<< 250 HELP
>>> XCLIENT NAME=
??? 501
<<< 501 XCLIENT: zero-length value for param
>>> XCLIENT NAME
??? 501
<<< 501 XCLIENT: missing value for parameter 'NAME'
End of script

******** SERVER ********
### (1) non-prox plain receive (not advertised) (2) XCLIENT refules when not advertised
### receive, (1) fully loaded (2) new conn (3) bad: transaction in progress (4) bad: missing EHLO after XCLIENT
###          (5) no operands to XCLIENT (6,7) unrecognised operands
###          (7) operand with zero-len value (8) operand with no value