Service unavailable 错误

红泥花生

Service unavailable 不能发信给对方,但是能收到对方发来的邮件,也能正常收发其他人的邮件.这是什么问题 \r\n\r\n================== \r\nSolaris 8 + Sendmail的环境 \r\n\r\n========在LOG里有错误信息========= \r\n/var/log/syslog:Nov 3 14:54:02 localhost sendmail[3938]: [ID 801593 mail.info] iA36ru403936: to=grandis@kit.hi-ho.ne.jp, \r\nctladdr=root (0/1), delay=00:00:06, xdelay=00:00:05, mailer=esmtp, pri=120083, relay=kit.hi-ho.ne.jp. [202.224.159.144], \r\ndsn=5.0.0, stat=Service unavailable \r\n\r\n/var/log/syslog:Nov 3 14:54:02 localhost sendmail[3938]: [ID 801593 mail.info] iA36ru403936: iA36s2303938: DSN: Service u \r\nnavailable \r\n\r\n==================本地的DNS解析没有问题======= \r\nlocal:root 104 >; nslookup -q=MX \r\nDefault Server: ns1.imsbiz.com \r\nAddress: 206.161.62.6 \r\n\r\n>; kit.hi-ho.ne.jp \r\nServer: ns1.imsbiz.com \r\nAddress: 206.161.62.6 \r\n\r\nNon-authoritative answer: \r\nkit.hi-ho.ne.jp preference = 10, mail exchanger = kit.hi-ho.ne.jp \r\n\r\nAuthoritative answers can be found from: \r\nhi-ho.ne.jp nameserver = dns1.pana.net \r\nhi-ho.ne.jp nameserver = dns0.pana.net \r\nkit.hi-ho.ne.jp internet address = 202.224.159.144 \r\ndns0.pana.net internet address = 218.42.190.103 \r\ndns1.pana.net internet address = 202.224.158.167 \r\n\r\n================ 也可以正常ping对方=========== \r\nPING 202.224.159.144: 56 data bytes \r\n64 bytes from kit.hi-ho.ne.jp (202.224.159.144): icmp_seq=0. time=288. ms \r\n64 bytes from kit.hi-ho.ne.jp (202.224.159.144): icmp_seq=1. time=668. ms \r\n64 bytes from kit.hi-ho.ne.jp (202.224.159.144): icmp_seq=2. time=295. ms \r\n\r\n========用window NT + EXCHANGE5.5的环境发,弹回错误信息===== \r\n========也不能发送邮件到对方,会弹回一个错误信息===== \r\nThe following recipient(s) could not be reached: \r\n>; \r\n>; \'grandis@kit.hi-ho.ne.jp\' on 11/3/2004 10:52 AM \r\n>; The recipient was unavailable to take delivery of the message \r\n>; MSEXCH:IMS:Integrated Concepts International \r\n>; Limited:ICILHK:ICILEXCH 3554 (000B09AA) 554 Invalid sender IP address