我的要求是向客户的邮件ID发送邮件。我在php中编写了一个程序，使用SMTP服务器发送邮件并将其托管在localhost上。它工作正常，我能够成功发送邮件。我使用了端口25。
现在我想使用相同的发件人ID运行相同的程序，这次是通过在我的域名上托管php程序。但是，我无法发送邮件。我应该做些什么改变？ 请注意，我不想使用我的域名电子邮件发送邮件。我想使用与localhost相同的gmail id发送邮件。
我的sendmail.ini看起来像这样：
; 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=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=my_domain_name.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=my_sender_id@gmail.com
auth_password=my_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=my_sender_id@gmail.com
; 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=