测试使用sendmail发送邮件

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 [127.0.0.1] via relay...
xinhaozheng@gmail.com... Deferred: Connection timed out with [127.0.0.1]

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 [127.0.0.1] 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 [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From: SIZE=14
250 2.1.0 ... Sender ok
>>> RCPT To:
>>> DATA
250 2.1.5 ... 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 [127.0.0.1]
>>> QUIT
221 2.0.0 server closing connection