PHP mail() 函数返回 true 但没有消息

Question

这是我的问题，

我有一个简单的 PHP 脚本，可以使用 mercury 邮件服务器将电子邮件发送到本地主机，并使用 Mozilla Thunderbird 阅读它。这是工作。

然后，我将 XAMPP 版本升级到 1.8.1，我的函数返回 true 但没有发送电子邮件。

<?php
$to = "root@localhost.com";
$subject = "Hi!";
$body="test";

$headers = "From: root@localhost.com"; 

if (mail($to, $subject, $body, $headers)) {
    echo "Message successfully sent!";
} else {
    echo "Message delivery failed...";
}
?>

我尝试用 Thunderbird 发送电子邮件到 root@localhost.com，它成功了。

所以我尝试将 php.ini 中的邮件功能更改为此但不起作用

    [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 = root@localhost.com

    ; XAMPP IMPORTANT NOTE (1): If XAMPP is installed in a base directory with spaces (e.g. c:\program filesC:\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:\xampp\sendmail\sendmail.exe\" -t"

    ; XAMPP: Comment out this if you want to work with mailToDisk, It writes all mails in the C:\xampp\mailoutput folder
    sendmail_path = "C:\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:\xampp\php\logs\php_mail.log"

I try to change sendmail.ini to this but not work

; 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=localhost

; smtp port (normally 25)

smtp_port=25

; 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=
auth_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=

有什么想法吗？

Answer 1

如果 mail 返回 true，那么 php 的工作就完成了。它已将电子邮件移交给您的外发邮件服务器。您需要检查该服务器的日志以了解从那时起发生了什么。

例如PHP 在发送电子邮件中的作用基本上相当于拿起您递给它的信封，走到街角，然后将它投进邮箱。之后，PHP 就完成了，它可以报告成功。

如果那个邮箱被一个醉酒的司机撞坏了并且邮件被毁坏了，那不是 PHP 的错。如果邮件被接收并发送到邮政分拣设施然后丢失，那也不是 PHP 的问题。

所以去检查你的邮件服务器的日志。如果它不能投递邮件，它会报告原因。如果它DID 将邮件投递到目标服务器，它会这样报告，然后您需要找出接收服务器未完成其工作的原因 - 也许您的电子邮件被标记为垃圾邮件扔进垃圾桶。