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從協(xié)議分析網(wǎng)上，查找到SMTP協(xié)議的命令和應(yīng)答，SMTP協(xié)議在發(fā)送SMTP和接收SMTP之間的會(huì)話是靠發(fā)送SMTP的SMTP命令和接收SMTP反饋的應(yīng)答來(lái)完成的。常用的命令如下：
HELLO＜domain＞＜CRLF＞識(shí)別發(fā)送方到接收SMTP的一個(gè)HELLO命令
MAIL FROM:＜reverse-path＞＜CRLF＞＜reverse-path＞為發(fā)送者地址。此命令告訴接收方一個(gè)新郵件發(fā)送的開(kāi)始，并對(duì)所有的狀態(tài)和緩沖區(qū)進(jìn)行初始化。此命令開(kāi)始一個(gè)郵件傳輸處理，最終完成將郵件數(shù)據(jù)傳送到一個(gè)或多個(gè)郵箱中。
RCPT TO:＜forward-path＞＜CRLF＞＜forward-path＞標(biāo)識(shí)各個(gè)郵件接收者的地址
DATA＜CRLF＞
接收SMTP將把其后的行為看作郵件數(shù)據(jù)去處理，以＜CRLF＞.＜CRLF＞標(biāo)識(shí)數(shù)據(jù)的結(jié)尾。
REST＜CRLF＞退出/復(fù)位當(dāng)前的郵件傳輸
NOOP＜CRLF＞要求接收SMTP僅做OK應(yīng)答。（用于測(cè)試）
QUIT＜CRLF＞要求接收SMTP返回一個(gè)OK應(yīng)答并關(guān)閉傳輸。
VRFY＜string＞＜CRLF＞驗(yàn)證指定的郵箱是否存在，由于安全因素，服務(wù)器多禁止此命令。
EXPN＜string＞＜CRLF＞驗(yàn)證給定的郵箱列表是否存在，擴(kuò)充郵箱列表，也常禁止使用。
HELP＜CRLF＞查詢(xún)服務(wù)器支持什么命令
注：＜CRLF＞為回車(chē)、換行，ASCII碼分別為13、10（十進(jìn)制）。
另外，可以在command下，使用telNET來(lái)進(jìn)行簡(jiǎn)單的手工使用SMTP。
比如：
telNET smtp.263.NET 25
Trying 211.150.96.25...
Connected to smtp.263.NET.
Escape character is '^]'.
220 Welcome to coremail System(With Anti-Spam) 2.1 for 263(040326)
HELO weiqiong@cctk.NET
250 smtp.263.NET
mail from:weiqiong@cctk.NET
250 Ok
rcpt to:g2_t1@263.NET
250 Ok
data
354 End data with <CR><LF>.<CR><LF>
haha
.
250 Ok: queued as B9E452FF3E
quit
221 Bye
Connection closed by foreign host.
在此基礎(chǔ)上就可以寫(xiě)出一個(gè)簡(jiǎn)單的SMTP類(lèi)了。
<?
class stmp{
private $mailcfg=array();
private $error_msg='';
function __construct($mailcfg){
$this->mailcfg=$mailcfg;
}
public function send($mail){
$mailcfg=$this->mailcfg;
if(!$fp = fsockopen($mailcfg['server'], $mailcfg['port'], $errno, $errstr, 30)) {
return $this->error("($mailcfg[server]:$mailcfg[port]) CONNECT - Unable to connect to the SMTP server, please check your /"mail_config.php/".");
}
stream_set_blocking($fp, true);
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != '220') {
return $this->error("$mailcfg[server]:$mailcfg[port] CONNECT - $lastmessage");
}
fputs($fp, ($mailcfg['auth'] ? 'EHLO' : 'HELO')." ".$mailcfg['auth_username']."/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 220 && substr($lastmessage, 0, 3) != 250) {
return $this->error("($mailcfg[server]:$mailcfg[port]) HELO/EHLO - $lastmessage");
}
while(1) {
if(substr($lastmessage, 3, 1) != '-' || empty($lastmessage)) {
break;
}
$lastmessage = fgets($fp, 512);
}
if($mailcfg['auth']) {
fputs($fp, "AUTH LOGIN/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 334) {
return $this->error("($mailcfg[server]:$mailcfg[port]) AUTH LOGIN - $lastmessage");
}
fputs($fp, base64_encode($mailcfg['auth_username'])."/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 334) {
return $this->error("($mailcfg[server]:$mailcfg[port]) USERNAME - $lastmessage");
}
fputs($fp, base64_encode($mailcfg['auth_password'])."/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 235) {
return $this->error("($mailcfg[server]:$mailcfg[port]) PASSWORD - $lastmessage");
}
$email_from = $mailcfg['from'];
}
fputs($fp, "MAIL FROM: <".preg_replace("/.*/<(.+?)/>.*/", "http://1", $email_from).">/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 250) {
fputs($fp, "MAIL FROM: <".preg_replace("/.*/<(.+?)/>.*/", "http://1", $email_from).">/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 250) {
return $this->error("($mailcfg[server]:$mailcfg[port]) MAIL FROM - $lastmessage");
}
}
$email_to=$mail['to'];
foreach(explode(',', $email_to) as $touser) {
$touser = trim($touser);
if($touser) {
fputs($fp, "RCPT TO: <$touser>/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 250) {
fputs($fp, "RCPT TO: <$touser>/r/n");
$lastmessage = fgets($fp, 512);
return $this->error("($mailcfg[server]:$mailcfg[port]) RCPT TO - $lastmessage");
}
}
}
fputs($fp, "DATA/r/n");
$lastmessage = fgets($fp, 512);
if(substr($lastmessage, 0, 3) != 354) {
return $this->error("($mailcfg[server]:$mailcfg[port]) DATA - $lastmessage");
}
$str="To: $email_to/r/nFrom: $email_from/r/nSubject: ".$mail['subject']."/r/n/r/n".$mail['content']."/r/n./r/n";
fputs($fp, $str);
fputs($fp, "QUIT/r/n");
return true;
}
public function get_error(){
return $this->error_msg;
}
private function error($msg){
$this->error_msg.=$msg;
return false;
}
}
?>
簡(jiǎn)單的調(diào)用例子：
<?
$mailcfg['server'] = 'smtp.163.com';
$mailcfg['port'] = '25';
$mailcfg['auth'] = 1;
$mailcfg['from'] = 'test <test@163.com>';
$mailcfg['auth_username'] = 'test';
$mailcfg['auth_password'] = 'password';
$stmp=new stmp($mailcfg);
$mail=array('to'=>'test@gmail.com','subject'=>'測(cè)試標(biāo)題','content'=>'郵件內(nèi)容<a href="http://www.phpobject.NET">php面向?qū)ο?lt;/a>');
if(!$stmp->send($mail)){
echo $stmp->get_error();
}else{
echo 'mail succ!';
}
?>
如果發(fā)送成功，你就可以去郵箱查看郵件了。^_^
php技術(shù)：php下使用SMTP發(fā)郵件的代碼，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
