Mail Returns False

Mail returns false

If the class is only a wrapper around the function mail, I would try printing to a file the parameters used when calling the mail function

PHP mail function returns false despite all the settings

I would recommend using PHPMailer to send email from PHP. Here's the steps to accomplish this.

1. Go to the Github repository.
2. Download the ZIP.
3. Extract it in your public_html directory.
4. include '/path/to/PHPMailer/PHPMailerAutoload.php'; at the top of your PHP script.
5. Get the values from the HTML form like you normally would.

Here's an example...

index.html

<form action="index.php" method="post">
    <input type="email" name="email">
    <input type="text" name="name">
    <input type="text" name="subject">
    <input type="text" name="message">
</form>

index.php

include '/path/to/PHPMailer/PHPMailerAutoload.php';

$email = $_POST['email'];
$name = $_POST['name'];
$subject = $_POST['subject'];
$message = $_POST['message'];

$mail = new PHPMailer;
$mail->isSMTP(); // Set mailer to use SMTP
$mail->Host = 'localhost'; // Specify main and backup SMTP servers
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = 'username'; // SMTP username
$mail->Password = 'password'; // SMTP password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, "ssl" also accepted
$mail->Port = 587; // TCP port to connect to

$mail->setFrom('your email', 'your name'); // from
$mail->addAddress($email, $name); // to
$mail->isHTML(true); // if html

$mail->Subject = $subject;
$mail->Body = $message; //HTML

if($mail->send()){
    echo 'Mail sent!';
}
else {
    echo 'Mail failed!';
}

PHP mail() returns false but no error is logged

1. Check if sendmail is running on the server.
2. Check /var/log/maillog

What would cause PHPMailer's $mail-send() to return false?

From the source:

/**
 * Create a message and send it.
 * Uses the sending method specified by $Mailer.
 *
 * @throws Exception
 *
 * @return bool false on error - See the ErrorInfo property for details of the error
 */
public function send()
{
    try {
        if (!$this->preSend()) {
            return false;
        }
        return $this->postSend();
    } catch (Exception $exc) {
        $this->mailHeader = '';
        $this->setError($exc->getMessage());
        if ($this->exceptions) {
            throw $exc;
        }
        return false;
    }
}

and the preSend() method:

/**
     * Prepare a message for sending.
     *
     * @throws Exception
     *
     * @return bool
     */
    public function preSend()
    {
        if ('smtp' == $this->Mailer or
            ('mail' == $this->Mailer and stripos(PHP_OS, 'WIN') === 0)
        ) {
            //SMTP mandates RFC-compliant line endings
            //and it's also used with mail() on Windows
            static::setLE("\r\n");
        } else {
            //Maintain backward compatibility with legacy Linux command line mailers
            static::setLE(PHP_EOL);
        }
        //Check for buggy PHP versions that add a header with an incorrect line break
        if (ini_get('mail.add_x_header') == 1
            and 'mail' == $this->Mailer
            and stripos(PHP_OS, 'WIN') === 0
            and ((version_compare(PHP_VERSION, '7.0.0', '>=')
                    and version_compare(PHP_VERSION, '7.0.17', '<'))
                or (version_compare(PHP_VERSION, '7.1.0', '>=')
                    and version_compare(PHP_VERSION, '7.1.3', '<')))
        ) {
            trigger_error(
                'Your version of PHP is affected by a bug that may result in corrupted messages.' .
                ' To fix it, switch to sending using SMTP, disable the mail.add_x_header option in' .
                ' your php.ini, switch to MacOS or Linux, or upgrade your PHP to version 7.0.17+ or 7.1.3+.',
                E_USER_WARNING
            );
        }
        try {
            $this->error_count = 0; // Reset errors
            $this->mailHeader = '';
            // Dequeue recipient and Reply-To addresses with IDN
            foreach (array_merge($this->RecipientsQueue, $this->ReplyToQueue) as $params) {
                $params[1] = $this->punyencodeAddress($params[1]);
                call_user_func_array([$this, 'addAnAddress'], $params);
            }
            if (count($this->to) + count($this->cc) + count($this->bcc) < 1) {
                throw new Exception($this->lang('provide_address'), self::STOP_CRITICAL);
            }
            // Validate From, Sender, and ConfirmReadingTo addresses
            foreach (['From', 'Sender', 'ConfirmReadingTo'] as $address_kind) {
                $this->$address_kind = trim($this->$address_kind);
                if (empty($this->$address_kind)) {
                    continue;
                }
                $this->$address_kind = $this->punyencodeAddress($this->$address_kind);
                if (!static::validateAddress($this->$address_kind)) {
                    $error_message = sprintf('%s (%s): %s',
                        $this->lang('invalid_address'),
                        $address_kind,
                        $this->$address_kind);
                    $this->setError($error_message);
                    $this->edebug($error_message);
                    if ($this->exceptions) {
                        throw new Exception($error_message);
                    }
                    return false;
                }
            }
            // Set whether the message is multipart/alternative
            if ($this->alternativeExists()) {
                $this->ContentType = static::CONTENT_TYPE_MULTIPART_ALTERNATIVE;
            }
            $this->setMessageType();
            // Refuse to send an empty message unless we are specifically allowing it
            if (!$this->AllowEmpty and empty($this->Body)) {
                throw new Exception($this->lang('empty_message'), self::STOP_CRITICAL);
            }
            //Trim subject consistently
            $this->Subject = trim($this->Subject);
            // Create body before headers in case body makes changes to headers (e.g. altering transfer encoding)
            $this->MIMEHeader = '';
            $this->MIMEBody = $this->createBody();
            // createBody may have added some headers, so retain them
            $tempheaders = $this->MIMEHeader;
            $this->MIMEHeader = $this->createHeader();
            $this->MIMEHeader .= $tempheaders;
            // To capture the complete message when using mail(), create
            // an extra header list which createHeader() doesn't fold in
            if ('mail' == $this->Mailer) {
                if (count($this->to) > 0) {
                    $this->mailHeader .= $this->addrAppend('To', $this->to);
                } else {
                    $this->mailHeader .= $this->headerLine('To', 'undisclosed-recipients:;');
                }
                $this->mailHeader .= $this->headerLine(
                    'Subject',
                    $this->encodeHeader($this->secureHeader($this->Subject))
                );
            }
            // Sign with DKIM if enabled
            if (!empty($this->DKIM_domain)
                and !empty($this->DKIM_selector)
                and (!empty($this->DKIM_private_string)
                    or (!empty($this->DKIM_private)
                        and static::isPermittedPath($this->DKIM_private)
                        and file_exists($this->DKIM_private)
                    )
                )
            ) {
                $header_dkim = $this->DKIM_Add(
                    $this->MIMEHeader . $this->mailHeader,
                    $this->encodeHeader($this->secureHeader($this->Subject)),
                    $this->MIMEBody
                );
                $this->MIMEHeader = rtrim($this->MIMEHeader, "\r\n ") . static::$LE .
                    static::normalizeBreaks($header_dkim) . static::$LE;
            }
            return true;
        } catch (Exception $exc) {
            $this->setError($exc->getMessage());
            if ($this->exceptions) {
                throw $exc;
            }
            return false;
        }
    }

So in short: It returns false, if an exception occurs.

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