PEAR 邮件无法连接到 Gmail SMTP，无法连接到套接字

事实

我正在使用PEAR邮件，我想使用gmail SMTP发送邮件。我有Apache / 2.4.27（Win64）PHP / 7.2.0beta3，PEAR 1.10.15，Mail 1.4.1，Net_SMTP 1.8.0，Net_Socket 1.2.2。

我去并添加了.不会给出与 ssl 相关的错误。php.iniextension = php_openssl.dllerror.log

这是代码

require_once "Mail.php";

$from = '<slevin@gmail.com>';
$to = '<slevinkelevra@gmal.com>';
$subject = 'Hi!';
$body = "Hi,\n\nHow are you?";

$headers = array(
    'From' => $from,
    'To' => $to,
    'Subject' => $subject
);

$smtp = Mail::factory('smtp', array(
        'host' => 'ssl://smtp.gmail.com',
        'port' => '465',
        'auth' => true,
        'username' => 'slevinmail@gmail.com',
        'password' => 'mypassword'
    ));

$mail = $smtp->send($to, $headers, $body);

if (PEAR::isError($mail)) {
    echo('<p>' . $mail->getMessage() . '</p>');
} else {
    echo('<p>Message successfully sent!</p>');
}

问题

我收到此错误

Failed to connect to ssl://smtp.gmail.com:465 [SMTP: Failed to connect socket: fsockopen(): unable to connect to ssl://smtp.gmail.com:465 (Unknown error) (code: -1, response: )]

我不知道该怎么办，我用谷歌搜索，但我变得更加困惑。

请就如何解决此问题提供建议。谢谢

更新

按照symcbean的指示，我得到了以下结果：

bool(true) 

array(5) { 
[0]=> string(31) "alt3.gmail-smtp-in.l.google.com" 
[1]=> string(26) "gmail-smtp-in.l.google.com" 
[2]=> string(31) "alt4.gmail-smtp-in.l.google.com" 
[3]=> string(31) "alt1.gmail-smtp-in.l.google.com" 
[4]=> string(31) "alt2.gmail-smtp-in.l.google.com" } 
IPV4 address = 64.233.188.27

If you've got this far without errors then problem is with your SSL config

Check you've got your cacerts deployed in one of the following locations
default_cert_file = C:\Program Files\Common Files\SSL/cert.pem
default_cert_file_env = SSL_CERT_FILE
default_cert_dir = C:\Program Files\Common Files\SSL/certs
default_cert_dir_env = SSL_CERT_DIR
default_private_dir = C:\Program Files\Common Files\SSL/private
default_default_cert_area = C:\Program Files\Common Files\SSL
ini_cafile = 
ini_capath = 

If all good so far, then this bit should work....
fsockopen 
Warning: fsockopen(): SSL operation failed with code 1. OpenSSL Error messages: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed in C:\Apache24\htdocs\phptest2.php on line 28

Warning: fsockopen(): Failed to enable crypto in C:\Apache24\htdocs\phptest2.php on line 28

Warning: fsockopen(): unable to connect to ssl://smtp.gmail.com:465 (Unknown error) in C:\Apache24\htdocs\phptest2.php on line 28
bool(false) int(0) string(0) "" 

28号线就是这条线var_dump(fsockopen("ssl://smtp.gmail.com", 465, $errno, $errstr, 3.0));

再次感谢

更新 #2

我只谷歌了“fsockopen（）：SSL操作失败，代码为1。

到这里结束。我更改了AVG的邮件端口，就像答案一样。symcbean 的代码运行没有错误，但我的代码回复了mail error : authentication failure [SMTP: Invalid response code received from server (code: 534, response: 5.7.14 Please log in via your web browser and 5.7.14 then try again. 5.7.14 Learn more at 5.7.14 https://support.google.com/mail/answer/78754 c1sm1243434wre.84 - gsmtp)]

所以我谷歌和结束在这里，按照emgh3i的第一个答案的说明，启用不太安全的连接，并允许访问我的谷歌帐户code: 534, response: 5.7.14

它现在工作得很好。