Send mail SMTP Error Could not connect to SMTP host. Solution to send fail _php tutorial

(1) The server cannot send mail using SMTP

Workaround: Many sites listed the solution is because of the SMTP case, although the nature of the problem is not here, but do need to change this place, as for why, look at the following operation.

In class.phpmailer.php, you will:

function Issmtp () {$this->mailer= ' SMTP ';}

Change to:

function Issmtp () {$this->mailer = ' SMTP ';}

Instead of using SMTP to send mail, this place uses a different way to send mail, checking the class.phpmailer.php file for the following paragraph:

Switch ($this->mailer) {case ' SendMail ': Return $this->sendmailsend ($header, $body); case ' SMTP ':// Because SMTP and SMTP are not equal, the following mailsend is selected to send mail instead of sending mail using SMTP return $this->smtpsend ($header, $body);d Efault:return $this- >mailsend ($header, $body);}

(2) the Fsockopen () function is disabled for Linux hosts

There are many space service providers in China to disable the server's Fsockopen function for security reasons.

Workaround:

Use the Pfsockopen () function instead of fsockopen (), and if the Pfsockopen function is also disabled, you can replace the socket function with other operations, such as Stream_socket_client ().

Change @fsockopen into a @pfsockopen in class.smtp.php

Put

$this->smtp_conn = @fsockopen ($host,    //The host of the server                                 $port,    //The port to use                                 $errno,   / /error number if any                                 $errstr,  //error message if any                                 $tval);   Give up after? secs

Change to:

$this->smtp_conn = @pfsockopen ($host,    //The host of the server                                 $port,    //The port to use                                 $errno, 
  //error number if any                                 $errstr,  //error message if any                                 $tval);   Give up after? secs

(3) Firewall security settings rules, if the above two scenarios are not effective, it is estimated that the firewall rules, you can let the server administrator remove all firewall rules, and then test to see if this is the reason.

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