Linux -- 测试sendmail邮件发送
又碰到邮件问题，在magento前台注册新用户，下订单都没有收到邮件。但是提示都是说正常。直接在ssh中使用下列命令测试，连接超时：
echo "Subject: test" | /usr/lib/sendmail -v xinhaozheng(at)gmail.com
(注：很多人在测试时直接把命令复制进去测试，导致我收到了N多的测试邮件。)
提示：
WARNING: local host name (server) is not qualified; see cf/README: WHO AM I?
xinhaozheng@gmail.com... Connecting to via relay...
xinhaozheng@gmail.com... Deferred: Connection timed out with
怀疑是ISP封掉了25端口。检查一下防火墙，暂时关掉iptables，再用这个命令测试，可以通过：
WARNING: local host name (server) is not qualified; see cf/README: WHO AM I?
xinhaozheng@gmail.com... Connecting to via relay...
220 server ESMTP Sendmail 8.13.8/8.13.8; Thu, 29 Apr 2010 03:22:42 +0200
>>> EHLO server
250-server Hello localhost.localdomain , pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From:<root@server> SIZE=14
250 2.1.0 <root@server>... Sender ok
>>> RCPT To:<xinhaozheng@gmail.com>
>>> DATA
250 2.1.5 <xinhaozheng@gmail.com>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
250 2.0.0 o3T1Mg5Z016990 Message accepted for delivery
xinhaozheng@gmail.com... Sent (o3T1Mg5Z016990 Message accepted for delivery)
Closing connection to
>>> QUIT
221 2.0.0 server closing connection
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