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<?php
namespace WPMailSMTP;
/**
* Class Processor modifies the behaviour of wp_mail() function.
*
* @since 1.0.0
*/
class Processor {
/**
* This attribute will hold the "original" WP from email address passed to the wp_mail_from filter,
* that is not equal to the default email address.
*
* It should hold an email address set via the wp_mail_from filter, before we might overwrite it.
*
* @since 2.1.0
*
* @var string
*/
protected $wp_mail_from;
/**
* Assign all hooks to proper places.
*
* @since 1.0.0
*/
public function hooks() {
add_action( 'phpmailer_init', array( $this, 'phpmailer_init' ) );
// High priority number tries to ensure our plugin code executes last and respects previous hooks, if not forced.
add_filter( 'wp_mail_from', array( $this, 'filter_mail_from_email' ), PHP_INT_MAX );
add_filter( 'wp_mail_from_name', array( $this, 'filter_mail_from_name' ), PHP_INT_MAX );
}
/**
* Redefine certain PHPMailer options with our custom ones.
*
* @since 1.0.0
*
* @param \PHPMailer $phpmailer It's passed by reference, so no need to return anything.
*/
public function phpmailer_init( $phpmailer ) {
$options = new Options();
$mailer = $options->get( 'mail', 'mailer' );
// Check that mailer is not blank, and if mailer=smtp, host is not blank.
if (
! $mailer ||
( 'smtp' === $mailer && ! $options->get( 'smtp', 'host' ) )
) {
return;
}
// If the mailer is pepipost, make sure we have a username and password.
if (
'pepipost' === $mailer &&
( ! $options->get( 'pepipost', 'user' ) && ! $options->get( 'pepipost', 'pass' ) )
) {
return;
}
// Set the mailer type as per config above, this overrides the already called isMail method.
// It's basically always 'smtp'.
$phpmailer->Mailer = $mailer;
// Set the Sender (return-path) if required.
if ( $options->get( 'mail', 'return_path' ) ) {
$phpmailer->Sender = $phpmailer->From;
}
// Set the SMTPSecure value, if set to none, leave this blank. Possible values: 'ssl', 'tls', ''.
if ( 'none' === $options->get( $mailer, 'encryption' ) ) {
$phpmailer->SMTPSecure = '';
} else {
$phpmailer->SMTPSecure = $options->get( $mailer, 'encryption' );
}
// Check if user has disabled SMTPAutoTLS.
if ( $options->get( $mailer, 'encryption' ) !== 'tls' && ! $options->get( $mailer, 'autotls' ) ) {
$phpmailer->SMTPAutoTLS = false;
}
// Check if original WP from email can be set as the reply_to attribute.
if ( $this->allow_setting_original_from_email_to_reply_to( $phpmailer->getReplyToAddresses(), $mailer ) ) {
$phpmailer->addReplyTo( $this->wp_mail_from );
}
// If we're sending via SMTP, set the host.
if ( 'smtp' === $mailer ) {
// Set the other options.
$phpmailer->Host = $options->get( $mailer, 'host' );
$phpmailer->Port = $options->get( $mailer, 'port' );
// If we're using smtp auth, set the username & password.
if ( $options->get( $mailer, 'auth' ) ) {
$phpmailer->SMTPAuth = true;
$phpmailer->Username = $options->get( $mailer, 'user' );
$phpmailer->Password = $options->get( $mailer, 'pass' );
}
} elseif ( 'pepipost' === $mailer ) {
// Set the Pepipost settings for BC.
$phpmailer->Mailer = 'smtp';
$phpmailer->Host = 'smtp.pepipost.com';
$phpmailer->Port = $options->get( $mailer, 'port' );
$phpmailer->SMTPSecure = $options->get( $mailer, 'encryption' ) === 'none' ? '' : $options->get( $mailer, 'encryption' );
$phpmailer->SMTPAuth = true;
$phpmailer->Username = $options->get( $mailer, 'user' );
$phpmailer->Password = $options->get( $mailer, 'pass' );
}
// Maybe set default reply-to header.
$this->set_default_reply_to( $phpmailer );
// You can add your own options here.
// See the phpmailer documentation for more info: https://github.com/PHPMailer/PHPMailer/tree/5.2-stable.
/** @noinspection PhpUnusedLocalVariableInspection It's passed by reference. */
$phpmailer = apply_filters( 'wp_mail_smtp_custom_options', $phpmailer );
}
/**
* Check if it's allowed to set the original WP from email to the reply_to field.
*
* @since 2.1.0
*
* @param array $reply_to Array of currently set reply to emails.
* @param string $mailer The slug of current mailer.
*
* @return bool
*/
protected function allow_setting_original_from_email_to_reply_to( $reply_to, $mailer ) {
$options = new Options();
$forced = $options->get( 'mail', 'from_email_force' );
$from_email = $options->get( 'mail', 'from_email' );
if ( ! empty( $reply_to ) || empty( $this->wp_mail_from ) ) {
return false;
}
if ( in_array( $mailer, [ 'outlook', 'zoho' ], true ) ) {
$sender = $options->get( $mailer, 'user_details' );
$from_email = ! empty( $sender['email'] ) ? $sender['email'] : '';
$forced = true;
}
if (
$from_email === $this->wp_mail_from ||
! $forced
) {
return false;
}
return true;
}
/**
* This method will be called every time 'smtp' and 'mail' mailers will be used to send emails.
*
* @since 1.3.0
* @since 1.5.0 Added a do_action() to be able to hook into.
*
* @param bool $is_sent
* @param array $to
* @param array $cc
* @param array $bcc
* @param string $subject
* @param string $body
* @param string $from
*/
public static function send_callback( $is_sent, $to, $cc, $bcc, $subject, $body, $from ) {
if ( ! $is_sent ) {
// Add mailer to the beginning and save to display later.
Debug::set(
'Mailer: ' . esc_html( wp_mail_smtp()->get_providers()->get_options( Options::init()->get( 'mail', 'mailer' ) )->get_title() ) . "\r\n" .
'PHPMailer was able to connect to SMTP server but failed while trying to send an email.'
);
} else {
Debug::clear();
}
do_action( 'wp_mail_smtp_mailcatcher_smtp_send_after', $is_sent, $to, $cc, $bcc, $subject, $body, $from );
}
/**
* Modify the email address that is used for sending emails.
*
* @since 1.0.0
* @since 1.3.0 Forcing email rewrite if option is selected.
* @since 1.7.0 Default email may be empty, so pay attention to that as well.
*
* @param string $wp_email The email address passed by the filter.
*
* @return string
*/
public function filter_mail_from_email( $wp_email ) {
$options = new Options();
$forced = $options->get( 'mail', 'from_email_force' );
$from_email = $options->get( 'mail', 'from_email' );
$def_email = WP::get_default_email();
// Save the "original" set WP email from address for later use.
if ( $wp_email !== $def_email ) {
$this->wp_mail_from = filter_var( $wp_email, FILTER_VALIDATE_EMAIL );
}
// Return FROM EMAIL if forced in settings.
if ( $forced & ! empty( $from_email ) ) {
return $from_email;
}
// If the FROM EMAIL is not the default, return it unchanged.
if ( ! empty( $def_email ) && $wp_email !== $def_email ) {
return $wp_email;
}
return ! empty( $from_email ) ? $from_email : $wp_email;
}
/**
* Modify the sender name that is used for sending emails.
*
* @since 1.0.0
* @since 1.3.0 Forcing name rewrite if option is selected.
*
* @param string $name
*
* @return string
*/
public function filter_mail_from_name( $name ) {
$options = new Options();
$force = $options->get( 'mail', 'from_name_force' );
// If the FROM NAME is not the default and not forced, return it unchanged.
if ( ! $force && $name !== $this->get_default_name() ) {
return $name;
}
$name = $options->get( 'mail', 'from_name' );
return $name;
}
/**
* Get the default email address based on domain name.
*
* @since 1.0.0
* @since 1.7.0 May return an empty string.
*
* @return string Empty string when we aren't able to get the site domain (CLI, misconfigured server etc).
*/
public function get_default_email() {
$server_name = Geo::get_site_domain();
if ( empty( $server_name ) ) {
return '';
}
// Get rid of www.
$sitename = strtolower( $server_name );
if ( substr( $sitename, 0, 4 ) === 'www.' ) {
$sitename = substr( $sitename, 4 );
}
return 'wordpress@' . $sitename;
}
/**
* Get the default email FROM NAME generated by WordPress.
*
* @since 1.3.0
*
* @return string
*/
public function get_default_name() {
return 'WordPress';
}
/**
* Get or create the phpmailer.
*
* @since 1.9.0
*
* @return MailCatcherInterface
*/
public function get_phpmailer() {
global $phpmailer;
// Make sure the PHPMailer class has been instantiated.
if ( ! is_object( $phpmailer ) || ! is_a( $phpmailer, 'PHPMailer' ) ) {
$phpmailer = wp_mail_smtp()->generate_mail_catcher( true ); // phpcs:ignore
}
return $phpmailer;
}
/**
* Set the default reply_to header, if:
* - no other reply_to headers are already set and,
* - the default reply_to address filter `wp_mail_smtp_processor_default_reply_to_addresses` is configured.
*
* @since 2.1.1
*
* @param MailCatcherInterface $phpmailer The PHPMailer object.
*/
private function set_default_reply_to( $phpmailer ) {
if ( ! empty( $phpmailer->getReplyToAddresses() ) ) {
return;
}
$default_reply_to_emails = apply_filters( 'wp_mail_smtp_processor_set_default_reply_to', '' );
if ( empty( $default_reply_to_emails ) ) {
return;
}
foreach ( explode( ',', $default_reply_to_emails ) as $email ) {
$email = trim( $email );
if ( filter_var( $email, FILTER_VALIDATE_EMAIL ) ) {
$phpmailer->addReplyTo( $email );
}
}
}
}