wp_mail_smtp.php — WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin 4.4.0

wp-mail-smtp / wp_mail_smtp.php

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wp_mail_smtp.php

350 lines

1	<?php
2	/**
3	* Plugin Name: WP Mail SMTP
4	* Version: 4.4.0
5	* Requires at least: 5.5
6	* Requires PHP: 7.2
7	* Plugin URI: https://wpmailsmtp.com/
8	* Description: Reconfigures the <code>wp_mail()</code> function to use Gmail/Mailgun/SendGrid/SMTP instead of the default <code>mail()</code> and creates an options page to manage the settings.
9	* Author: WP Mail SMTP
10	* Author URI: https://wpmailsmtp.com/
11	* Network: false
12	* Text Domain: wp-mail-smtp
13	* Domain Path: /assets/languages
14	*/
15
16	/**
17	* @author WPForms
18	* @copyright WPForms, 2007-23, All Rights Reserved
19	* This code is released under the GPL licence version 3 or later, available here
20	* https://www.gnu.org/licenses/gpl.txt
21	*/
22
23	/**
24	* Setting options in wp-config.php
25	*
26	* Specifically aimed at WP Multisite users, you can set the options for this plugin as
27	* constants in wp-config.php. Copy the code below into wp-config.php and tweak settings.
28	* Values from constants are NOT stripslash()'ed.
29	*
30	* When enabled, make sure to comment out (at the beginning of the line using //) those constants that you do not need,
31	* or remove them completely, so they won't interfere with plugin settings.
32	*/
33
34	/*
35	define( 'WPMS_ON', true ); // True turns on the whole constants support and usage, false turns it off.
36
37	define( 'WPMS_DO_NOT_SEND', true ); // Or false, in that case constant is ignored.
38
39	define( 'WPMS_MAIL_FROM', 'mail@example.com' );
40	define( 'WPMS_MAIL_FROM_FORCE', true ); // True turns it on, false turns it off.
41	define( 'WPMS_MAIL_FROM_NAME', 'From Name' );
42	define( 'WPMS_MAIL_FROM_NAME_FORCE', true ); // True turns it on, false turns it off.
43	define( 'WPMS_MAILER', 'sendinblue' ); // Possible values: 'mail', 'smtpcom', 'sendinblue', 'mailgun', 'sendgrid', 'gmail', 'smtp'.
44	define( 'WPMS_SET_RETURN_PATH', true ); // Sets $phpmailer->Sender if true, relevant only for Other SMTP mailer.
45
46	// Recommended mailers.
47	define( 'WPMS_SMTPCOM_API_KEY', '' );
48	define( 'WPMS_SMTPCOM_CHANNEL', '' );
49	define( 'WPMS_SENDINBLUE_API_KEY', '' );
50	define( 'WPMS_SENDINBLUE_DOMAIN', '' );
51
52	define( 'WPMS_ZOHO_DOMAIN', '' );
53	define( 'WPMS_ZOHO_CLIENT_ID', '' );
54	define( 'WPMS_ZOHO_CLIENT_SECRET', '' );
55
56	define( 'WPMS_PEPIPOST_API_KEY', '' );
57
58	define( 'WPMS_SENDINBLUE_API_KEY', '' );
59
60	define( 'WPMS_MAILGUN_API_KEY', '' );
61	define( 'WPMS_MAILGUN_DOMAIN', '' );
62	define( 'WPMS_MAILGUN_REGION', 'US' ); // or 'EU' for Europe.
63
64	define( 'WPMS_SENDGRID_API_KEY', '' );
65
66	define( 'WPMS_GMAIL_CLIENT_ID', '' );
67	define( 'WPMS_GMAIL_CLIENT_SECRET', '' );
68
69	define( 'WPMS_SMTP_HOST', 'localhost' ); // The SMTP mail host.
70	define( 'WPMS_SMTP_PORT', 25 ); // The SMTP server port number.
71	define( 'WPMS_SSL', '' ); // Possible values '', 'ssl', 'tls' - note TLS is not STARTTLS.
72	define( 'WPMS_SMTP_AUTH', true ); // True turns it on, false turns it off.
73	define( 'WPMS_SMTP_USER', 'username' ); // SMTP authentication username, only used if WPMS_SMTP_AUTH is true.
74	define( 'WPMS_SMTP_PASS', 'password' ); // SMTP authentication password, only used if WPMS_SMTP_AUTH is true.
75	define( 'WPMS_SMTP_AUTOTLS', true ); // True turns it on, false turns it off.
76	*/
77
78	/**
79	* Don't allow multiple versions of 1.5.x (Lite and Pro) and above to be active.
80	*
81	* @since 1.5.0
82	*/
83	if ( function_exists( 'wp_mail_smtp' ) ) {
84
85	if ( ! function_exists( 'wp_mail_smtp_deactivate' ) ) {
86	/**
87	* Deactivate if plugin already activated.
88	* Needed when transitioning from 1.5+ Lite to Pro.
89	*
90	* @since 1.5.0
91	*/
92	function wp_mail_smtp_deactivate() {
93	/*
94	* Prevent issues of WP functions not being available for other plugins that hook into
95	* this early deactivation. GH issue #861.
96	*/
97	require_once ABSPATH . WPINC . '/pluggable.php';
98
99	deactivate_plugins( plugin_basename( __FILE__ ) );
100	}
101	}
102	add_action( 'admin_init', 'wp_mail_smtp_deactivate' );
103
104	// Do not process the plugin code further.
105	return;
106	}
107
108	if ( ! function_exists( 'wp_mail_smtp_check_pro_loading_allowed' ) ) {
109	/**
110	* Don't allow 1.4.x and below to break when 1.5+ Pro is activated.
111	* This will stop the current plugin from loading and display a message in admin area.
112	*
113	* @since 1.5.0
114	*/
115	function wp_mail_smtp_check_pro_loading_allowed() {
116
117	// Check for pro without using wp_mail_smtp()->is_pro(), because at this point it's too early.
118	if ( ! is_readable( rtrim( plugin_dir_path( __FILE__ ), '/\\' ) . '/src/Pro/Pro.php' ) ) {
119	// Currently, not a pro version of the plugin is loaded.
120	return false;
121	}
122
123	if ( ! function_exists( 'is_plugin_active' ) ) {
124	require_once ABSPATH . '/wp-admin/includes/plugin.php';
125	}
126
127	$lite_plugin_slug = 'wp-mail-smtp/wp_mail_smtp.php';
128
129	// Search for old plugin name.
130	if ( is_plugin_active( $lite_plugin_slug ) ) {
131	/*
132	* Prevent issues of WP functions not being available for other plugins that hook into
133	* this early deactivation. GH issue #861.
134	*/
135	require_once ABSPATH . WPINC . '/pluggable.php';
136
137	if (
138	is_multisite() &&
139	is_plugin_active_for_network( plugin_basename( __FILE__ ) ) &&
140	! is_plugin_active_for_network( $lite_plugin_slug )
141	) {
142	// Deactivate Lite plugin if Pro activated on Network level.
143	deactivate_plugins( $lite_plugin_slug );
144	} else {
145	// As Pro is loaded and Lite too - deactivate silently itself not to break older SMTP plugin.
146	deactivate_plugins( plugin_basename( __FILE__ ) );
147
148	if ( is_network_admin() ) {
149	add_action( 'network_admin_notices', 'wp_mail_smtp_lite_deactivation_notice' );
150	} else {
151	add_action( 'admin_notices', 'wp_mail_smtp_lite_deactivation_notice' );
152	}
153
154	return true;
155	}
156	}
157
158	return false;
159	}
160
161	if ( ! function_exists( 'wp_mail_smtp_lite_deactivation_notice' ) ) {
162	/**
163	* Display the notice after deactivation.
164	*
165	* @since 1.5.0
166	*/
167	function wp_mail_smtp_lite_deactivation_notice() {
168
169	echo '<div class="notice notice-warning"><p>' . esc_html__( 'Please deactivate the free version of the WP Mail SMTP plugin before activating WP Mail SMTP Pro.', 'wp-mail-smtp' ) . '</p></div>';
170
171	if ( isset( $_GET['activate'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
172	unset( $_GET['activate'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
173	}
174	}
175	}
176
177	// Stop the plugin loading.
178	if ( wp_mail_smtp_check_pro_loading_allowed() === true ) {
179	return;
180	}
181	}
182
183	if ( ! function_exists( 'wp_mail_smtp_insecure_php_version_notice' ) ) {
184	/**
185	* Display admin notice, if the server is using old/insecure PHP version.
186	*
187	* @since 2.0.0
188	*/
189	function wp_mail_smtp_insecure_php_version_notice() {
190
191	?>
192	<div class="notice notice-error">
193	<p>
194	<?php
195	printf(
196	wp_kses( /* translators: %1$s - WPBeginner URL for recommended WordPress hosting. */
197	__( 'Your site is running an <strong>insecure version</strong> of PHP that is no longer supported. Please contact your web hosting provider to update your PHP version or switch to a <a href="%1$s" target="_blank" rel="noopener noreferrer">recommended WordPress hosting company</a>.', 'wp-mail-smtp' ),
198	array(
199	'a' => array(
200	'href' => array(),
201	'target' => array(),
202	'rel' => array(),
203	),
204	'strong' => array(),
205	)
206	),
207	'https://www.wpbeginner.com/wordpress-hosting/'
208	);
209	?>
210	<br><br>
211	<?php
212
213	$doc_link = add_query_arg(
214	[
215	'utm_source' => 'WordPress',
216	'utm_medium' => 'Admin Notice',
217	'utm_campaign' => is_readable( rtrim( plugin_dir_path( __FILE__ ), '/\\' ) . '/src/Pro/Pro.php' ) ? 'plugin' : 'liteplugin',
218	'utm_content' => 'Minimal Required PHP Version',
219	],
220	'https://wpmailsmtp.com/docs/supported-php-versions-for-wp-mail-smtp/'
221	);
222
223	printf(
224	wp_kses( /* translators: %s - WPMailSMTP.com docs URL with more details. */
225	__( '<strong>WP Mail SMTP plugin is disabled</strong> on your site until you fix the issue. <a href="%s" target="_blank" rel="noopener noreferrer">Read more for additional information.</a>', 'wp-mail-smtp' ),
226	array(
227	'a' => array(
228	'href' => array(),
229	'target' => array(),
230	'rel' => array(),
231	),
232	'strong' => array(),
233	)
234	),
235	esc_url( $doc_link )
236	);
237	?>
238	</p>
239	</div>
240
241	<?php
242
243	// In case this is on plugin activation.
244	if ( isset( $_GET['activate'] ) ) { //phpcs:ignore
245	unset( $_GET['activate'] ); //phpcs:ignore
246	}
247	}
248	}
249
250	if ( ! defined( 'WPMS_PLUGIN_VER' ) ) {
251	/**
252	* Plugin version.
253	*
254	* @since 0.11.1
255	*/
256	define( 'WPMS_PLUGIN_VER', '4.4.0' );
257	}
258	if ( ! defined( 'WPMS_PHP_VER' ) ) {
259	/**
260	* Minimum supported PHP version.
261	*
262	* @since 1.0.0
263	*/
264	define( 'WPMS_PHP_VER', '7.2' );
265	}
266	if ( ! defined( 'WPMS_WP_VER' ) ) {
267	/**
268	* Minimum supported WordPress version.
269	*
270	* @since 3.3.0
271	*/
272	define( 'WPMS_WP_VER', '5.5' );
273	}
274	if ( ! defined( 'WPMS_PLUGIN_FILE' ) ) {
275	/**
276	* Plugin main file path.
277	*
278	* @since 2.1.2
279	*/
280	define( 'WPMS_PLUGIN_FILE', __FILE__ );
281	}
282
283	if ( ! function_exists( 'wp_mail_smtp_unsupported_wp_version_notice' ) ) {
284	/**
285	* Display admin notice, if the site is using unsupported WP version.
286	*
287	* @since 3.3.0
288	*/
289	function wp_mail_smtp_unsupported_wp_version_notice() {
290
291	?>
292	<div class="notice notice-error">
293	<p>
294	<?php
295	printf(
296	wp_kses( /* translators: %s The minimal WP version supported by WP Mail SMTP. */
297	__( 'Your site is running an <strong>old version</strong> of WordPress that is no longer supported by WP Mail SMTP. Please update your WordPress site to at least version <strong>%s</strong>.', 'wp-mail-smtp' ),
298	[
299	'strong' => [],
300	]
301	),
302	esc_html( WPMS_WP_VER )
303	);
304	?>
305	<br><br>
306	<?php
307	echo wp_kses(
308	__( '<strong>WP Mail SMTP plugin is disabled</strong> on your site until WordPress is updated to the required version.', 'wp-mail-smtp' ),
309	[
310	'strong' => [],
311	]
312	);
313	?>
314	</p>
315	</div>
316
317	<?php
318
319	// In case this is on plugin activation.
320	if ( isset( $_GET['activate'] ) ) { //phpcs:ignore
321	unset( $_GET['activate'] ); //phpcs:ignore
322	}
323	}
324	}
325
326	/**
327	* Display admin notice and prevent plugin code execution, if the server is
328	* using old/insecure PHP version.
329	*
330	* @since 2.0.0
331	*/
332	if ( version_compare( phpversion(), WPMS_PHP_VER, '<' ) ) {
333	add_action( 'admin_notices', 'wp_mail_smtp_insecure_php_version_notice' );
334
335	return;
336	}
337
338	/**
339	* Display admin notice and prevent plugin code execution, if the WP version is lower than WPMS_WP_VER.
340	*
341	* @since 3.3.0
342	*/
343	if ( version_compare( get_bloginfo( 'version' ), WPMS_WP_VER, '<' ) ) {
344	add_action( 'admin_notices', 'wp_mail_smtp_unsupported_wp_version_notice' );
345
346	return;
347	}
348
349	require_once dirname( __FILE__ ) . '/wp-mail-smtp.php';
350