我已阅读有关同一问题的类似帖子，并尝试对问题进行排查，但似乎无效。我有Windows 8 64位，我正在运行XAMPP版本1.8.3。
这是php.ini
中[mail function]的代码[mail function]
; XAMPP: Comment out this if you want to work with an SMTP Server like Mercury
; SMTP = localhost
; smtp_port = 25
; For Win32 only.
; http://php.net/sendmail-from
;sendmail_from = postmaster@localhost
; XAMPP IMPORTANT NOTE (1): If XAMPP is installed in a base directory with spaces (e.g. c:\program filesC:\web\xampp) fakemail and mailtodisk do not work correctly.
; XAMPP IMPORTANT NOTE (2): In this case please copy the sendmail or mailtodisk folder in your root folder (e.g. C:\sendmail) and use this for sendmail_path.
; XAMPP: Comment out this if you want to work with fakemail for forwarding to your mailbox (sendmail.exe in the sendmail folder)
sendmail_path = "\"C:\web\xampp\sendmail\sendmail.exe\" -t"
; XAMPP: Comment out this if you want to work with mailToDisk, It writes all mails in the C:\web\xampp\mailoutput folder
;sendmail_path="C:\web\xampp\mailtodisk\mailtodisk.exe"
; Force the addition of the specified parameters to be passed as extra parameters
; to the sendmail binary. These parameters will always replace the value of
; the 5th parameter to mail(), even in safe mode.
;mail.force_extra_parameters =
; Add X-PHP-Originating-Script: that will include uid of the script followed by the filename
mail.add_x_header=Off
; Log all mail() calls including the full path of the script, line #, to address and headers
; mail.log = "C:\web\xampp\php\logs\php_mail.log"
sendmail_path应该是正确的。我用maildisk注释掉sendmail_path。有一个警告，文件目录的名称中不应该有任何空格，我不认为这适用于我。还有一个php.ini-development和php.ini-production文件XAMPP的php目录，我想确保不应该修改它们。
这是sendmail.ini的代码：
; configuration for fake sendmail
; if this file doesn't exist, sendmail.exe will look for the settings in
; the registry, under HKLM\Software\Sendmail
[sendmail]
; you must change mail.mydomain.com to your smtp server,
; or to IIS's "pickup" directory. (generally C:\Inetpub\mailroot\Pickup)
; emails delivered via IIS's pickup directory cause sendmail to
; run quicker, but you won't get error messages back to the calling
; application.
smtp_server=smtp.gmail.com
; smtp port (normally 25)
smtp_port=587
; SMTPS (SSL) support
; auto = use SSL for port 465, otherwise try to use TLS
; ssl = alway use SSL
; tls = always use TLS
; none = never try to use SSL
smtp_ssl=auto
; the default domain for this server will be read from the registry
; this will be appended to email addresses when one isn't provided
; if you want to override the value in the registry, uncomment and modify
;default_domain=mydomain.com
; log smtp errors to error.log (defaults to same directory as sendmail.exe)
; uncomment to enable logging
error_logfile=error.log
; create debug log as debug.log (defaults to same directory as sendmail.exe)
; uncomment to enable debugging
;debug_logfile=debug.log
; if your smtp server requires authentication, modify the following two lines
auth_username=email@gmail.com
auth_password=password
; if your smtp server uses pop3 before smtp authentication, modify the
; following three lines. do not enable unless it is required.
pop3_server=
pop3_username=
pop3_password=
; force the sender to always be the following email address
; this will only affect the "MAIL FROM" command, it won't modify
; the "From: " header of the message content
force_sender=
; force the sender to always be the following email address
; this will only affect the "RCTP TO" command, it won't modify
; the "To: " header of the message content
force_recipient=
; sendmail will use your hostname and your default_domain in the ehlo/helo
; smtp greeting. you can manually set the ehlo/helo name if required
hostname=
我想确认端口应该是587.我正在使用gmail帐户发送电子邮件。我想知道是否需要对gmail的设置进行任何更改以允许该程序访问它并发送电子邮件？
这是我试图按照mail（）函数的php页面运行的测试代码：
<?php
$to = 'example@yahoo.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: example@gmail.com' . "\r\n" .
'Reply-To: example@gmail.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
if (mail($to, $subject, $message, $headers)) {
echo "sent";
} else {
echo "not sent";
}
?>
我可以尝试发送给雅虎电子邮件吗？是否有可能存在一个我错的小细节（如空格或次要语法细节）？我包括$ header，因为我读到它是必需的。另外，有没有办法直接从php获取错误，告诉我为什么mail（）返回false？
更新： 我将以下代码添加到php.ini中，现在看来我可以看到错误：
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
我收到以下错误：
警告：mail（）：无法连接到＆＃34; localhost＆＃34;的邮件服务器端口25，验证您的＆＃34; SMTP＆＃34;和＆＃34; smtp_port＆＃34;在php.ini中设置或在第29行的C：\ web \ xampp \ htdocs \ arctic \ mail.php中使用ini_set（）
（这是我的mail（）函数的行）
我在sendmail.ini中将端口设置为587。我是否还必须在php.ini中设置它？
另外，我刚刚在XAMPP控制面板上启动了Mercury模块，现在我得到了一个不同的错误：
警告：mail（）：SMTP服务器响应：553我们不转发非本地邮件，抱歉。在第29行的C：\ web \ xampp \ htdocs \ arctic \ mail.php
我意识到这是一个很长的问题，我事先感谢任何人的帮助！