当我尝试从新系统发送电子邮件时：
Distributor ID: Scientific
Description: Scientific Linux release 6.4 (Carbon)
Release: 6.4
Codename: Carbon
版本sendmail8.14.4
我的邮件日志上有此错误消息：
Jul 1 12:17:43 server5 sendmail[5806]: NOQUEUE: connect from localhost.localdomain [127.0.0.1]
Jul 1 12:17:43 server5 sendmail[5806]: AUTH: available mech=DIGEST-MD5 ANONYMOUS GSSAPI PLAIN CRAM-MD5 LOGIN, allowed mech=EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5
Jul 1 12:17:43 server5 sendmail[5806]: r61AHhHH005806: Milter: no active filter
Jul 1 12:17:43 server5 sendmail[5806]: r61AHhHH005806: --- 220 server5.eda ESMTP Sendmail 8.14.4/8.14.4; Mon, 1 Jul 2013 12:17:43 +0200
Jul 1 12:17:43 server5 sendmail[5806]: r61AHhHH005806: --- 421 4.4.1 server5.eda Lost input channel from localhost.localdomain [127.0.0.1]
Jul 1 12:17:43 server5 sendmail[5806]: r61AHhHH005806: localhost.localdomain [127.0.0.1] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
Jul 1 12:17:43 server5 sendmail[5807]: NOQUEUE: connect from server5 [192.168.1.12]
Jul 1 12:17:43 server5 sendmail[5807]: AUTH: available mech=DIGEST-MD5 ANONYMOUS GSSAPI PLAIN CRAM-MD5 LOGIN, allowed mech=EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: Milter: no active filter
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 220 server5.eda ESMTP Sendmail 8.14.4/8.14.4; Mon, 1 Jul 2013 12:17:43 +0200
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: <-- EHLO 192.168.1.12
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-server5.eda Hello server5 [192.168.1.12], pleased to meet you
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-ENHANCEDSTATUSCODES
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-PIPELINING
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-8BITMIME
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-SIZE
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-DSN
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-ETRN
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-AUTH GSSAPI DIGEST-MD5 CRAM-MD5
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250-DELIVERBY
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 250 HELP
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: <-- AUTH DIGEST-MD5
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 334 bm9uY2U9ImxFUmRaUEh6NnZQVzVxU3lsNXJwUnZZamRuaksrNUwyZk5jRnN6K2JSQ3M9IixyZWFsbT0ic2VydmVyNS5lZGEiLHFv cD0iYXV0aCxhdXRoLWludCxhdXRoLWNvbmYiLGNpcGhlcj0icmM0LTQwLHJjNC01NixyYzQsZGVzLDNkZXMiLG1heGJ1Zj04MTky LGNoYXJzZXQ9dXRmLTgsYWxnb3JpdGhtPW1kNS1zZXNz
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 535 5.7.0 authentication failed
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: AUTH failure (DIGEST-MD5): generic failure (-1) SASL(-1): generic failure: unable canonify user and get auxprops, relay=server5 [192.168.1.12]
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: --- 421 4.4.1 server5.eda Lost input channel from server5 [192.168.1.12]
Jul 1 12:17:43 server5 sendmail[5807]: r61AHhhS005807: server5 [192.168.1.12] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
注意：server5 和 localhost 是同一台机器。
这不会发生在这台机器上：
Distributor ID: ScientificSL
Description: Scientific Linux SL release 5.5 (Boron)
Release: 5.5
Codename: Boron
版本sendmail8.13.8
最新版本有什么问题吗？