通过 Xampp 发送本地电子邮件时出现 Gmail 错误(必须发出 STARTTLS 命令）

我安装了XAMPP服务器，现在我正在尝试通过gmail服务器发送本地电子邮件。为此，我点击了此链接并更改了我的 php.ini 和 sendmail.ini如下所示：

PHP.ini

[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = smtp.gmail.com
; http://php.net/smtp-port
smtp_port = 587
; For Win32 only.
; http://php.net/sendmail-from
sendmail_from = xxx.xxx@gmail.com
; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
; http://php.net/sendmail-path
sendmail_path = "'"C:'xampp'sendmail'sendmail.exe'" -t"
; 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"

发送邮件.ini

; 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
; 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=local
; 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=xxx.xxx@gmail.com
auth_password=xxx
; if your smtp server uses pop3 before smtp authentication, modify the 
; following three lines
;pop3_server=
;pop3_username=
;pop3_password=
; to force the sender to always be the following email address, uncomment and
; populate with a valid email address.  this will only affect the "MAIL FROM"
; command, it won't modify the "From: " header of the message content
force_sender=xxx.xxx@gmail.com
; 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=localhost

使用这些设置，我将从gmail服务器返回以下错误：

16/01/18 20:47:28 ** Connecting to smtp.gmail.com:587
16/01/18 20:47:28 ** Connected.
16/01/18 20:47:28 << 220 smtp.gmail.com ESMTP w80sm17190895wme.17 - gsmtp<EOL>
16/01/18 20:47:28 >> EHLO SamClauw<EOL>
16/01/18 20:47:28 << 250-smtp.gmail.com at your service, [213.118.20.101]<EOL>250-SIZE 35882577<EOL>250-8BITMIME<EOL>250-STARTTLS<EOL>250-ENHANCEDSTATUSCODES<EOL>250-PIPELINING<EOL>250-CHUNKING<EOL>250 SMTPUTF8<EOL>
16/01/18 20:47:28 ** Authenticating as xxx.xxx@gmail.com
16/01/18 20:47:28 >> MAIL FROM: <xxx.xxx@gmail.com><EOL>
16/01/18 20:47:28 << 530 5.7.0 Must issue a STARTTLS command first. w80sm17190895wme.17 - gsmtp<EOL>
16/01/18 20:47:28 ** Disconnecting from smtp.gmail.com:587
16/01/18 20:47:28 ** Disconnected.
16/01/18 20:47:28 ** Disconnected.
16/01/18 20:47:28 ** Must issue a STARTTLS command first. w80sm17190895wme.17 - gsmtp<EOL>

如您所见：我已经建立了连接，但在那之后，STARTTLS 命令或其他东西出现了问题。

我用谷歌搜索了很多尝试：

• XAMPP 的管理员权限
• SMTP 端口 25 和 465
• ssl://smtp.gmail.com 而不是 smtp.gmail.com
• 我的 Gmail 帐户的安全性降低
• 。

但这些都无济于事。是否有人遇到同样的问题并且可以解决此问题？我应该更改什么设置才能最终工作？

谢谢;)