通过smarthost在非标准端口发送邮件

Question

我正试图让我的sendmail服务器以最聪明的方式通过GoDaddy发送邮件。我确认我可以在端口3535上打电话到smtpout.secureserver.net，并且他们的SMTP正确地响应。但是我的sendmail服务就是不能把邮件发出去，我也不明白为什么。我已经将sendmail中最聪明的部分配置为：

define(`SMART_HOST', `smtpout.secureserver.net')dnl
define(`RELAY_MAILER',`esmtp')dnl
define(`RELAY_MAILER_ARGS', `TCP $h 3535')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
FEATURE(`authinfo',`hash /data/smtp/client-info')dnl

邮件日志显示(在日志级别99)：

Feb 26 12:03:56 myhost sendmail[4694]: v1QH3uXi004692: SMTP outgoing connect on [172.31.234.15]
Feb 26 12:03:57 myhost sendmail[4694]: AUTH=client, relay=smtpout.secureserver.net., mech=LOGIN, bits=0
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3uXi004692: to=<validuser@mydomain.com>, ctladdr=<root@myhost.mydomain.com> (0/0), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=120448, relay=smtpout.secureserver.net. [173.201.192.229], dsn=5.0.0, stat=Service unavailable
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3uXi004692: dropenvelope, e_flags=0x4605862, OpMode=q, pid=4694
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3uXi004692: alias <root@myhost.mydomain.com> => support@mydomain.com
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3vXi004694: assigned id
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3uXi004692: v1QH3vXi004694: DSN: Service unavailable
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3vXi004694: queueup ./qfv1QH3vXi004694
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3vXi004694: sendenvelope, flags=0x604082
Feb 26 12:03:57 myhost sendmail[4694]: v1QH3vXi004694: SMTP outgoing connect on [172.31.234.15]
Feb 26 12:03:58 myhost sendmail[4694]: AUTH=client, relay=smtpout.secureserver.net., mech=LOGIN, bits=0
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: to=support@mydomain.com, delay=00:00:02, xdelay=00:00:02, mailer=relay, pri=31662, relay=smtpout.secureserver.net. [173.201.193.101], dsn=5.0.0, stat=Service unavailable
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: dropenvelope, e_flags=0x46050a2, OpMode=q, pid=4694
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: alias MAILER-DAEMON => postmaster
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: alias postmaster => root
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: alias root => support@mydomain.com
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: alias postmaster => root
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: alias root => support@mydomain.com
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXj004694: assigned id
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXi004694: v1QH3vXj004694: return to sender: Service unavailable
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXj004694: queueup ./qfv1QH3vXj004694
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXj004694: sendenvelope, flags=0x604082
Feb 26 12:03:59 myhost sendmail[4694]: v1QH3vXj004694: SMTP outgoing connect on [172.31.234.15]
Feb 26 12:03:59 myhost sendmail[4694]: AUTH=client, relay=smtpout.secureserver.net., mech=LOGIN, bits=0
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: to=support@mydomain.com, delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=32686, relay=smtpout.secureserver.net. [173.201.193.101], dsn=5.0.0, stat=Service unavailable
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: dropenvelope, e_flags=0x46050a2, OpMode=q, pid=4694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: alias MAILER-DAEMON => postmaster
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: alias postmaster => root
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: alias root => support@mydomain.com
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: unlink ./dfv1QH3vXj004694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: unlink ./qfv1QH3vXj004694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: done; delay=00:00:01, ntries=1
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: unlock
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: unlink ./xfv1QH3vXj004694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXj004694: ./xfv1QH3vXj004694: unlink-fail 2
Feb 26 12:04:00 myhost sendmail[4694]: NOQUEUE: dropenvelope, e_flags=0x4050a2, OpMode=q, pid=4694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: Losing ./qfv1QH3vXi004694: savemail panic
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: SYSERR(root): savemail: cannot save rejected email anywhere
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: unlink ./qfv1QH3vXi004694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: ./qfv1QH3vXi004694: unlink-fail 2
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: done; delay=00:00:03, ntries=1
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: unlock
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: unlink ./xfv1QH3vXi004694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3vXi004694: ./xfv1QH3vXi004694: unlink-fail 2
Feb 26 12:04:00 myhost sendmail[4694]: NOQUEUE: dropenvelope, e_flags=0x4050a2, OpMode=q, pid=4694
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: unlink ./dfv1QH3uXi004692
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: unlink ./qfv1QH3uXi004692
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: done; delay=00:00:04, ntries=1
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: unlock
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: unlink ./xfv1QH3uXi004692
Feb 26 12:04:00 myhost sendmail[4694]: v1QH3uXi004692: ./xfv1QH3uXi004692: unlink-fail 2
Feb 26 12:04:00 myhost sendmail[4694]: NOQUEUE: dropenvelope, e_flags=0x407062, OpMode=q, pid=4694

我认为这与连接有关，因为我在日志中没有看到其他错误。如果这是凭据相关，我可以张贴更多的信息。

有人能解释一下为什么会失败吗？

Answer 1

当问题在接收方时，sendmail似乎没有留下任何线索。以前，我使用telnet测试SMTP连接，但不认为我可以发送完整的电子邮件(通过telnet)，因为需要身份验证。我找到了此链接，它展示了如何构造auth命令，然后测试电子邮件。

结果是接收SMTP服务器拒绝邮件，因为FROM行上的域名没有DNS条目。修复后，邮件在telnet上传输，随后在sendmail上通过。