用PHP通过SMTP发送邮件
由于PHP没有提供现成的smtp函数,却提供了一个功能不甚灵活的mail()函数,这个函数需要服务器配置上的支持,并且不支持smtp验证,在很多场合无法正常的工作,因此不建议使用。本文的目的在于为新手指明方向,并没有涉及那些高级的内容,一来本身水平有限,二来也担心不能准确的讲述相关的概念,进而对各位造成误导,还请自行深入学习。
“使用php发送mail”最近已经成为继“register_globals”以后本版第二个新手陷阱,今天特地写这篇文章为新手解惑,希望可以为迷茫的人指明方向。
让我们先从以下这个例子开始说起:
引用:
[root@server~/]# telnet localhost 25 注:以上来自netkiller的postfix文档,偷懒,直接用现成的。 首先是使用telnet来连接本地的25端口,稍微熟悉点网络的人都知道smtp协议使用25端口,这也就是说,现在在连接本地的smtp服务器。 引用: Trying 127.0.0.1... 这些东西是系统输出信息,说明已经连接上了,而且这个smtp服务器是postfix做的。 “MAIL FROM: teste@dominio.com.br”这个命令指明了发件地址是teste@dominio.com.br,“250 Ok”说明这条命令被服务器接受并正确执行,这类似http协议的200、404、500等状态代码。接下来的“RCPT TO: teste@dominio.com.br”指明了收件地址是teste@dominio.com.br。 引用: DATA 这一段是输入邮件正文,输入“DATA”以后系统提示使用“.”来结束输入,正文内容是“teste”。 最后使用“QUIT”退出。
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 server.domain.com.br ESMTP Postfix (2.1.0)
MAIL FROM: teste@dominio.com.br
250 Ok
RCPT TO: teste@dominio.com.br
250 Ok
DATA
354 End data with
teste
.
250 Ok: queued as 7B41F4665A
QUIT
221 Bye
Connection closed by foreign host.
Connected to localhost.
Escape character is '^]'.
220 server.domain.com.br ESMTP Postfix (2.1.0)
354 End data with
teste
.
注:以上来自netkiller的postfix文档,偷懒,直接用现成的。
首先是使用telnet来连接本地的25端口,稍微熟悉点网络的人都知道smtp协议使用25端口,这也就是说,现在在连接本地的smtp服务器。
引用:
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 server.domain.com.br ESMTP Postfix (2.1.0)
这些东西是系统输出信息,说明已经连接上了,而且这个smtp服务器是postfix做的。
“MAIL FROM: teste@dominio.com.br”这个命令指明了发件地址是teste@dominio.com.br,“250 Ok”说明这条命令被服务器接受并正确执行,这类似http协议的200、404、500等状态代码。接下来的“RCPT TO: teste@dominio.com.br”指明了收件地址是teste@dominio.com.br。
引用:
DATA
354 End data with
teste
.
这一段是输入邮件正文,输入“DATA”以后系统提示使用“.”来结束输入,正文内容是“teste”。
最后使用“QUIT”退出。
注:以上来自netkiller的postfix文档,偷懒,直接用现成的。
首先是使用telnet来连接本地的25端口,稍微熟悉点网络的人都知道smtp协议使用25端口,这也就是说,现在在连接本地的smtp服务器。
引用:
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 server.domain.com.br ESMTP Postfix (2.1.0)
这些东西是系统输出信息,说明已经连接上了,而且这个smtp服务器是postfix做的。
“MAIL FROM: teste@dominio.com.br”这个命令指明了发件地址是teste@dominio.com.br,“250 Ok”说明这条命令被服务器接受并正确执行,这类似http协议的200、404、500等状态代码。接下来的“RCPT TO: teste@dominio.com.br”指明了收件地址是teste@dominio.com.br。
引用:
DATA
354 End data with
teste
.
这一段是输入邮件正文,输入“DATA”以后系统提示使用“.”来结束输入,正文内容是“teste”。
最后使用“QUIT”退出。
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