How can I enable mail in WordPress?

3 comments

1. As I posted here:

   This is a super annoying error message as it could be many things, and it doesn’t reveal the actual error (which is often silenced in other parts of the code).

   This error appears when the wp_mail() function returns false, which in turn could happen if phpmailer->Send() returns false or raises an exception.

   How to display warnings from PHP’s mail() function

   These are normally silenced by default, and unfortunately WordPress never captures them. To show them, simply remove the @ signs from @mail(... in wp-includes/class-phpmailer.php in the mailPassthru() function:

   if (ini_get('safe_mode') || !($this->UseSendmailOptions)) {
       $rt = @mail($to, $this->encodeHeader($this->secureHeader($subject)), $body, $header);
   } else {
       $rt = @mail($to, $this->encodeHeader($this->secureHeader($subject)), $body, $header, $params);
   }
   

   How to hunt down other possible causes:

   1. Add a single line to the bottom of wp_mail() in /wp-includes/pluggable.php:

      // Send!
      try {
          return $phpmailer->Send();
      } catch ( phpmailerException $e ) {
          //------------- This next line is the one to add -------------------
          if (WP_DEBUG) echo '<pre>' . esc_html(print_r($e, TRUE)) . '</pre>';
          return false;
      }
      

   2. It will dump the full details of where the exception was raised. Unfortunately it sometimes includes this unhelpful exception message: “Could not instantiate mail function“. Yeah thanks WordPress, that’s real helpful.

   3. By looking at the exception you can find the line number of the error, and can hopefully trace it back through the code to find the real cause.

   Good luck. Hopefully WordPress improves email error handling at some point in the future.

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2. I encountered this same problem and nothing I could find in any of the suggestions for WordPress solved it for me.

   Then I started investigating if it was the PHP installation itself that had disabled the mail function, but none of that worked either. Everything looked like it was configured properly.

   All of these problems started for me once I upgraded my server to CentOS 7 which uses SELinux (Security Enhanced Linux) and what I’ve learned in the last couple of weeks with SELinux is that if something isn’t working, but everything looks like it should be working… that means SELinux is silently and secretly blocking you in the background.

   And viola.

   If you are running and OS that uses SELinux, just execute the following command as root:

   setsebool -P httpd_can_sendmail=1

   There is a security setting that inherently prevents the webserver from sending email. When you flip that switch and tell SELinux it’s ok for the webserver to send email, everything suddenly works.

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3. it called -Manage Registered Email-Ids For Sending Mails via Scripts(WordPress)

   1. Login your Cpanel.
   2. Go to Email Section > then Click Registered Email IDs.
   3. then add (wordpress@yourdomain.com) or where your wordpress hosted. ie (wordpress@blog.yourdomain.com) . then submit, it takes few minute to activate wait 15minute to 1 hour depending to your hosting provider, then it will work.

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