スレを誘導されたのでこちらで質問させて下さい。　その２ー１

【エラーログの内容】
　　/var/log/maillog
Mar 6 02:11:16 localhost qmail: 1204737076.342791 starting delivery 39: msg 19727044 to remote hogehoge@m3.gyao.ne.jp
Mar 6 02:11:16 localhost qmail: 1204737076.343021 status: local 0/10 remote 2/20
Mar 6 02:11:16 localhost qmail: 1204737076.744935 delivery 38: failure: Connected_to_125.63.38.26_but_sender_was_rejected./Remote_host_said:_550_unrouteable_sender_address/
Mar 6 02:11:16 localhost qmail: 1204737076.745182 status: local 0/10 remote 1/20
Mar 6 02:11:16 localhost qmail: 1204737076.750492 bounce msg 19727040 qp 4335
Mar 6 02:11:16 localhost qmail: 1204737076.750639 end msg 19727040
Mar 6 02:11:16 localhost qmail: 1204737076.752434 delivery 39: failure: Connected_to_125.63.38.26_but_sender_was_rejected./Remote_host_said:_550_unrouteable_sender_address/
Mar 6 02:11:16 localhost qmail: 1204737076.752574 status: local 0/10 remote 0/20
Mar 6 02:11:16 localhost qmail: 1204737076.757930 bounce msg 19727044 qp 4336
Mar 6 02:11:16 localhost qmail: 1204737076.758185 end msg 19727044
Mar 6 02:11:16 localhost qmail: 1204737076.758591 new msg 19727043
Mar 6 02:11:16 localhost qmail: 1204737076.758714 info msg 19727043: bytes 901 from <> qp 4335 uid 507