zeus:~ seigi$ telnet relay-test.mail-abuse.org Trying 168.61.4.13... Connected to relay-test.mail-abuse.org. Escape character is '^]'. Connecting to 210.235.51.250 ... <<< 220 seigi.accsnet.ne.jp ESMTP Postfix >>> HELO cygnus.mail-abuse.org <<< 250 seigi.accsnet.ne.jp :Relay test: #Quote test >>> mail from: <<< 250 Ok >>> rcpt to: <"nobody@mail-abuse.org"> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 1 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 2 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #test 3 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 4 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 5 >>> mail from: <> <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 6 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 7 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 8 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 9 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 10 >>> mail from: <<< 250 Ok >>> rcpt to: <"nobody@mail-abuse.org"> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 11 >>> mail from: <<< 250 Ok >>> rcpt to: <"nobody%mail-abuse.org"> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 12 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 501 Bad recipient address syntax >>> rset <<< 250 Ok :Relay test: #Test 13 >>> mail from: <<< 250 Ok >>> rcpt to: <"nobody@mail-abuse.org"@[210.235.51.250]> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 14 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 15 >>> mail from: <<< 250 Ok >>> rcpt to: <@seigi.accsnet.ne.jp:nobody@mail-abuse.org> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 16 >>> mail from: <<< 250 Ok >>> rcpt to: <@[210.235.51.250]:nobody@mail-abuse.org> <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #Test 17 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #test 18 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 250 Ok :Relay test: #test 19 >>> mail from: <<< 250 Ok >>> rcpt to: <<< 554 : Relay access denied >>> rset <<< 421 seigi.accsnet.ne.jp Error: too many errors Connecting to 210.235.51.250 ... <<< 220 seigi.accsnet.ne.jp ESMTP Postfix >>> HELO cygnus.mail-abuse.org <<< 250 seigi.accsnet.ne.jp >>> QUIT <<< 221 Bye Tested host banner: 220 seigi.accsnet.ne.jp ESMTP Postfix System appeared to reject relay attempts Connection closed by foreign host. zeus:~ seigi$